diff --git a/Configuration/Geometry/python/GeometryDD4hepExtended2026D115Reco_cff.py b/Configuration/Geometry/python/GeometryDD4hepExtended2026D115Reco_cff.py
new file mode 100644
index 0000000000000..bdcad354c9faf
--- /dev/null
+++ b/Configuration/Geometry/python/GeometryDD4hepExtended2026D115Reco_cff.py
@@ -0,0 +1,63 @@
+import FWCore.ParameterSet.Config as cms
+
+# This config was generated automatically using generate2026Geometry.py
+# If you notice a mistake, please update the generating script, not just this config
+
+from Configuration.Geometry.GeometryDD4hepExtended2026D115_cff import *
+
+# tracker
+from Geometry.CommonTopologies.globalTrackingGeometry_cfi import *
+from RecoTracker.GeometryESProducer.TrackerRecoGeometryESProducer_cfi import *
+from Geometry.TrackerGeometryBuilder.TrackerAdditionalParametersPerDet_cfi import *
+from Geometry.TrackerGeometryBuilder.trackerParameters_cff import *
+from Geometry.TrackerNumberingBuilder.trackerTopology_cfi import *
+from Geometry.TrackerGeometryBuilder.idealForDigiTrackerGeometry_cff import *
+trackerGeometry.applyAlignment = True
+
+# calo
+from Geometry.CaloEventSetup.HGCalTopology_cfi import *
+from Geometry.HGCalGeometry.HGCalGeometryESProducer_cfi import *
+from Geometry.CaloEventSetup.HFNoseTopology_cfi import *
+from Geometry.ForwardGeometry.HFNoseGeometryESProducer_cfi import *
+from Geometry.CaloEventSetup.CaloTopology_cfi import *
+from Geometry.CaloEventSetup.CaloGeometryBuilder_cfi import *
+CaloGeometryBuilder = cms.ESProducer("CaloGeometryBuilder",
+    SelectedCalos = cms.vstring("HCAL",
+                                "ZDC",
+                                "EcalBarrel",
+                                "TOWER",
+                                "HGCalEESensitive",
+                                "HGCalHESiliconSensitive",
+                                "HGCalHEScintillatorSensitive",
+                                "HGCalHFNoseSensitive",
+    )
+)
+from Geometry.EcalAlgo.EcalBarrelGeometry_cfi import *
+from Geometry.HcalEventSetup.HcalGeometry_cfi import *
+from Geometry.HcalEventSetup.CaloTowerGeometry_cfi import *
+from Geometry.HcalEventSetup.CaloTowerTopology_cfi import *
+from Geometry.HcalCommonData.hcalDDDRecConstants_cfi import *
+from Geometry.HcalEventSetup.hcalTopologyIdeal_cfi import *
+from Geometry.CaloEventSetup.EcalTrigTowerConstituents_cfi import *
+from Geometry.EcalMapping.EcalMapping_cfi import *
+from Geometry.EcalMapping.EcalMappingRecord_cfi import *
+
+# muon
+from Geometry.MuonNumbering.muonNumberingInitialization_cfi import *
+from RecoMuon.DetLayers.muonDetLayerGeometry_cfi import *
+from Geometry.GEMGeometryBuilder.gemGeometry_cff import *
+from Geometry.CSCGeometryBuilder.idealForDigiCscGeometry_cff import *
+from Geometry.DTGeometryBuilder.idealForDigiDtGeometry_cff import *
+
+# forward
+from Geometry.ForwardGeometry.ZdcGeometry_cfi import *
+
+# timing
+from RecoMTD.DetLayers.mtdDetLayerGeometry_cfi import *
+from Geometry.MTDGeometryBuilder.mtdParameters_cff import *
+from Geometry.MTDNumberingBuilder.mtdNumberingGeometry_cff import *
+from Geometry.MTDNumberingBuilder.mtdTopology_cfi import *
+from Geometry.MTDGeometryBuilder.mtdGeometry_cfi import *
+from Geometry.MTDGeometryBuilder.idealForDigiMTDGeometry_cff import *
+mtdGeometry.applyAlignment = False
+
diff --git a/Configuration/Geometry/python/GeometryDD4hepExtended2026D115_cff.py b/Configuration/Geometry/python/GeometryDD4hepExtended2026D115_cff.py
new file mode 100644
index 0000000000000..a89579c77e852
--- /dev/null
+++ b/Configuration/Geometry/python/GeometryDD4hepExtended2026D115_cff.py
@@ -0,0 +1,19 @@
+import FWCore.ParameterSet.Config as cms
+
+# This config was generated automatically using generate2026Geometry.py
+# If you notice a mistake, please update the generating script, not just this config
+
+from Configuration.Geometry.GeometryDD4hep_cff import *
+DDDetectorESProducer.confGeomXMLFiles = cms.FileInPath("Geometry/CMSCommonData/data/dd4hep/cmsExtendedGeometry2026D115.xml")
+
+from Geometry.TrackerNumberingBuilder.trackerNumberingGeometry_cff import *
+from SLHCUpgradeSimulations.Geometry.fakePhase2OuterTrackerConditions_cff import *
+from Geometry.EcalCommonData.ecalSimulationParameters_cff import *
+from Geometry.HcalCommonData.hcalDDDSimConstants_cff import *
+from Geometry.HGCalCommonData.hgcalParametersInitialization_cfi import *
+from Geometry.HGCalCommonData.hgcalNumberingInitialization_cfi import *
+from Geometry.ForwardCommonData.hfnoseParametersInitialization_cfi import *
+from Geometry.ForwardCommonData.hfnoseNumberingInitialization_cfi  import *
+from Geometry.MuonNumbering.muonGeometryConstants_cff import *
+from Geometry.MuonNumbering.muonOffsetESProducer_cff import *
+from Geometry.MTDNumberingBuilder.mtdNumberingGeometry_cff import *
diff --git a/Configuration/Geometry/python/GeometryExtended2026D115Reco_cff.py b/Configuration/Geometry/python/GeometryExtended2026D115Reco_cff.py
new file mode 100644
index 0000000000000..3dac19b791a99
--- /dev/null
+++ b/Configuration/Geometry/python/GeometryExtended2026D115Reco_cff.py
@@ -0,0 +1,63 @@
+import FWCore.ParameterSet.Config as cms
+
+# This config was generated automatically using generate2026Geometry.py
+# If you notice a mistake, please update the generating script, not just this config
+
+from Configuration.Geometry.GeometryExtended2026D115_cff import *
+
+# tracker
+from Geometry.CommonTopologies.globalTrackingGeometry_cfi import *
+from RecoTracker.GeometryESProducer.TrackerRecoGeometryESProducer_cfi import *
+from Geometry.TrackerGeometryBuilder.TrackerAdditionalParametersPerDet_cfi import *
+from Geometry.TrackerGeometryBuilder.trackerParameters_cff import *
+from Geometry.TrackerNumberingBuilder.trackerTopology_cfi import *
+from Geometry.TrackerGeometryBuilder.idealForDigiTrackerGeometry_cff import *
+trackerGeometry.applyAlignment = True
+
+# calo
+from Geometry.CaloEventSetup.HGCalTopology_cfi import *
+from Geometry.HGCalGeometry.HGCalGeometryESProducer_cfi import *
+from Geometry.CaloEventSetup.HFNoseTopology_cfi import *
+from Geometry.ForwardGeometry.HFNoseGeometryESProducer_cfi import *
+from Geometry.CaloEventSetup.CaloTopology_cfi import *
+from Geometry.CaloEventSetup.CaloGeometryBuilder_cfi import *
+CaloGeometryBuilder = cms.ESProducer("CaloGeometryBuilder",
+    SelectedCalos = cms.vstring("HCAL",
+                                "ZDC",
+                                "EcalBarrel",
+                                "TOWER",
+                                "HGCalEESensitive",
+                                "HGCalHESiliconSensitive",
+                                "HGCalHEScintillatorSensitive",
+                                "HGCalHFNoseSensitive",
+    )
+)
+from Geometry.EcalAlgo.EcalBarrelGeometry_cfi import *
+from Geometry.HcalEventSetup.HcalGeometry_cfi import *
+from Geometry.HcalEventSetup.CaloTowerGeometry_cfi import *
+from Geometry.HcalEventSetup.CaloTowerTopology_cfi import *
+from Geometry.HcalCommonData.hcalDDDRecConstants_cfi import *
+from Geometry.HcalEventSetup.hcalTopologyIdeal_cfi import *
+from Geometry.CaloEventSetup.EcalTrigTowerConstituents_cfi import *
+from Geometry.EcalMapping.EcalMapping_cfi import *
+from Geometry.EcalMapping.EcalMappingRecord_cfi import *
+
+# muon
+from Geometry.MuonNumbering.muonNumberingInitialization_cfi import *
+from RecoMuon.DetLayers.muonDetLayerGeometry_cfi import *
+from Geometry.GEMGeometryBuilder.gemGeometry_cff import *
+from Geometry.CSCGeometryBuilder.idealForDigiCscGeometry_cff import *
+from Geometry.DTGeometryBuilder.idealForDigiDtGeometry_cff import *
+
+# forward
+from Geometry.ForwardGeometry.ZdcGeometry_cfi import *
+
+# timing
+from RecoMTD.DetLayers.mtdDetLayerGeometry_cfi import *
+from Geometry.MTDGeometryBuilder.mtdParameters_cff import *
+from Geometry.MTDNumberingBuilder.mtdNumberingGeometry_cff import *
+from Geometry.MTDNumberingBuilder.mtdTopology_cfi import *
+from Geometry.MTDGeometryBuilder.mtdGeometry_cfi import *
+from Geometry.MTDGeometryBuilder.idealForDigiMTDGeometry_cff import *
+mtdGeometry.applyAlignment = False
+
diff --git a/Configuration/Geometry/python/GeometryExtended2026D115_cff.py b/Configuration/Geometry/python/GeometryExtended2026D115_cff.py
new file mode 100644
index 0000000000000..01a499e7f4ec4
--- /dev/null
+++ b/Configuration/Geometry/python/GeometryExtended2026D115_cff.py
@@ -0,0 +1,17 @@
+import FWCore.ParameterSet.Config as cms
+
+# This config was generated automatically using generate2026Geometry.py
+# If you notice a mistake, please update the generating script, not just this config
+
+from Geometry.CMSCommonData.cmsExtendedGeometry2026D115XML_cfi import *
+from Geometry.TrackerNumberingBuilder.trackerNumberingGeometry_cff import *
+from SLHCUpgradeSimulations.Geometry.fakePhase2OuterTrackerConditions_cff import *
+from Geometry.EcalCommonData.ecalSimulationParameters_cff import *
+from Geometry.HcalCommonData.hcalDDDSimConstants_cff import *
+from Geometry.HGCalCommonData.hgcalParametersInitialization_cfi import *
+from Geometry.HGCalCommonData.hgcalNumberingInitialization_cfi import *
+from Geometry.ForwardCommonData.hfnoseParametersInitialization_cfi import *
+from Geometry.ForwardCommonData.hfnoseNumberingInitialization_cfi  import *
+from Geometry.MuonNumbering.muonGeometryConstants_cff import *
+from Geometry.MuonNumbering.muonOffsetESProducer_cff import *
+from Geometry.MTDNumberingBuilder.mtdNumberingGeometry_cff import *
diff --git a/Configuration/Geometry/python/dict2026Geometry.py b/Configuration/Geometry/python/dict2026Geometry.py
index bc2e46114c291..9205245be65c7 100644
--- a/Configuration/Geometry/python/dict2026Geometry.py
+++ b/Configuration/Geometry/python/dict2026Geometry.py
@@ -1389,6 +1389,7 @@
     ("O9","T37","C24","M11","F8","I17") : "D112",
     ("O9","T38","C24","M11","F8","I17") : "D113",
     ("O9","T39","C19","M11","F8","I17") : "D114",
+    ("O9","T35","C20","M11","F8","I17") : "D115",
 }
 
 deprecatedDets = set([ "D1", "D2", "D3", "D5", "D6" , "D7", "D4", "D8" , "D9", "D12", "D13", "D15", "D10", "D11", "D14", "D16", "D17", "D18", "D19", "D20", "D21", "D22", "D23", "D24", "D25", "D26", "D27", "D28", "D29", "D30", "D31", "D32", "D33", "D34", "D36", "D37", "D38", "D39", "D40", "D42", "D35", "D41", "D43", "D44", "D45", "D46", "D48", "D47", "D50", "D51", "D52", "D53", "D54", "D55", "D56", "D57", "D58", "D59", "D61", "D62", "D63", "D64", "D65", "D66", "D67", "D69", "D71", "D72", "D73", "D74", "D75", "D78", "D79", "D87", "D89", "D90", "D49", "D60", "D68", "D70", "D76", "D77", "D80", "D81", "D82", "D83", "D84", "D85"])
diff --git a/Configuration/PyReleaseValidation/python/relval_2026.py b/Configuration/PyReleaseValidation/python/relval_2026.py
index d4fbb778a5cc5..b829333ee205a 100644
--- a/Configuration/PyReleaseValidation/python/relval_2026.py
+++ b/Configuration/PyReleaseValidation/python/relval_2026.py
@@ -41,6 +41,7 @@
 numWFIB.extend([30434.0]) #2026D112
 numWFIB.extend([30834.0]) #2026D113
 numWFIB.extend([31234.0]) #2026D114
+numWFIB.extend([32034.0]) #2026D115
 
 #Additional sample for short matrix and IB
 #Default Phase-2 Det NoPU
diff --git a/Configuration/PyReleaseValidation/python/upgradeWorkflowComponents.py b/Configuration/PyReleaseValidation/python/upgradeWorkflowComponents.py
index 4dba111d3c129..4f5431808e1ff 100644
--- a/Configuration/PyReleaseValidation/python/upgradeWorkflowComponents.py
+++ b/Configuration/PyReleaseValidation/python/upgradeWorkflowComponents.py
@@ -97,6 +97,8 @@
     '2026D114PU',
     '2026D110GenOnly',
     '2026D110SimOnGen',
+    '2026D115',
+    '2026D115PU',
 ]
 
 # pre-generation of WF numbers
@@ -3175,6 +3177,13 @@ def condition(self, fragment, stepList, key, hasHarvest):
         'Era' : 'Phase2C17I13M9',
         'ScenToRun' : ['Gen','Sim','DigiTrigger','RecoGlobal', 'HARVESTGlobal', 'ALCAPhase2'],
     },
+    '2026D115' : {
+        'Geom' : 'Extended2026D115',
+        'HLTmenu': '@relval2026',
+        'GT' : 'auto:phase2_realistic_T33',
+        'Era' : 'Phase2C20I13M9',
+        'ScenToRun' : ['GenSimHLBeamSpot','DigiTrigger','RecoGlobal', 'HARVESTGlobal', 'ALCAPhase2'],
+    },
 }
 
 # standard PU sequences
diff --git a/Configuration/StandardSequences/python/GeometryConf.py b/Configuration/StandardSequences/python/GeometryConf.py
index efa88e12bfab6..35c1d2b0e422d 100644
--- a/Configuration/StandardSequences/python/GeometryConf.py
+++ b/Configuration/StandardSequences/python/GeometryConf.py
@@ -126,4 +126,6 @@
     'DD4hepExtended2026D113' : 'DD4hepExtended2026D113,DD4hepExtended2026D113Reco',
     'Extended2026D114' : 'Extended2026D114,Extended2026D114Reco',
     'DD4hepExtended2026D114' : 'DD4hepExtended2026D114,DD4hepExtended2026D114Reco',
+    'Extended2026D115' : 'Extended2026D115,Extended2026D115Reco',
+    'DD4hepExtended2026D115' : 'DD4hepExtended2026D115,DD4hepExtended2026D115Reco',
 }
diff --git a/Geometry/CMSCommonData/data/dd4hep/cmsExtendedGeometry2026D115.xml b/Geometry/CMSCommonData/data/dd4hep/cmsExtendedGeometry2026D115.xml
new file mode 100644
index 0000000000000..4095d3854b66f
--- /dev/null
+++ b/Geometry/CMSCommonData/data/dd4hep/cmsExtendedGeometry2026D115.xml
@@ -0,0 +1,130 @@
+<?xml version="1.0"?>
+<DDDefinition>
+  <open_geometry/>
+  <close_geometry/>
+
+  <IncludeSection>
+    <Include ref='Geometry/CMSCommonData/data/materials/2021/v1/materials.xml'/>
+    <Include ref='Geometry/CMSCommonData/data/rotations.xml'/>
+    <Include ref='Geometry/CMSCommonData/data/extend/v2/cmsextent.xml'/>
+    <Include ref='Geometry/CMSCommonData/data/cavernData/2021/v1/cavernData.xml'/>
+    <Include ref='Geometry/CMSCommonData/data/cms/2026/v5/cms.xml'/>
+    <Include ref='Geometry/CMSCommonData/data/cmsMother.xml'/>
+    <Include ref='Geometry/CMSCommonData/data/eta3/etaMax.xml'/>
+    <Include ref='Geometry/CMSCommonData/data/cmsTracker.xml'/>
+    <Include ref='Geometry/CMSCommonData/data/caloBase/2026/v7/caloBase.xml'/>
+    <Include ref='Geometry/CMSCommonData/data/cmsCalo.xml'/>
+    <Include ref='Geometry/CMSCommonData/data/muonBase/2026/v5/muonBase.xml'/>
+    <Include ref='Geometry/CMSCommonData/data/cmsMuon.xml'/>
+    <Include ref='Geometry/CMSCommonData/data/mgnt.xml'/>
+    <Include ref='Geometry/CMSCommonData/data/beampipe/2026/v3/beampipe.xml'/>
+    <Include ref='Geometry/CMSCommonData/data/cmsBeam/2026/v1/cmsBeam.xml'/>
+    <Include ref='Geometry/CMSCommonData/data/muonMB.xml'/>
+    <Include ref='Geometry/CMSCommonData/data/muonMagnet.xml'/>
+    <Include ref='Geometry/CMSCommonData/data/cavern/2021/v1/cavern.xml'/>
+    <Include ref='Geometry/CMSCommonData/data/cavernFloor/2017/v1/cavernFloor.xml'/>
+    <Include ref='Geometry/TrackerCommonData/data/PhaseII/trackerParameters.xml'/>
+    <Include ref='Geometry/TrackerCommonData/data/pixfwdCommon.xml'/>
+    <Include ref='Geometry/TrackerCommonData/data/PhaseII/Tracker_DD4hep_compatible_2021_02/pixfwd.xml'/>
+    <Include ref='Geometry/TrackerCommonData/data/PhaseII/Tracker_DD4hep_compatible_OT800_IT615_2022_10/pixbar.xml'/>
+    <Include ref='Geometry/TrackerCommonData/data/trackermaterial.xml'/>
+    <Include ref='Geometry/TrackerCommonData/data/PhaseII/Tracker_DD4hep_compatible_2021_03/tracker.xml'/>
+    <Include ref='Geometry/TrackerCommonData/data/PhaseII/OuterTracker616_2020_04/otst.xml'/>
+    <Include ref='Geometry/TrackerCommonData/data/PhaseII/Tracker_DD4hep_compatible_IT711_2023_05/pixel.xml'/>
+    <Include ref='Geometry/TrackerCommonData/data/PhaseII/TiltedTracker404/trackerbar.xml'/>
+    <Include ref='Geometry/TrackerCommonData/data/PhaseII/TiltedTracker404/trackerfwd.xml'/>
+    <Include ref='Geometry/TrackerCommonData/data/PhaseII/Tracker_DD4hep_compatible_2021_02/trackerStructureTopology.xml'/>
+    <Include ref='Geometry/TrackerCommonData/data/PhaseII/Tracker_DD4hep_compatible_IT711_2023_05/pixelStructureTopology.xml'/>
+    <Include ref='Geometry/TrackerSimData/data/PhaseII/Tracker_DD4hep_compatible_2021_02/trackersens.xml'/>
+    <Include ref='Geometry/TrackerSimData/data/PhaseII/Tracker_DD4hep_compatible_IT711_2023_05/pixelsens.xml'/>
+    <Include ref='Geometry/TrackerRecoData/data/PhaseII/Tracker_DD4hep_compatible_IT711_2023_05/trackerRecoMaterial.xml'/>
+    <Include ref='Geometry/TrackerSimData/data/PhaseII/Tracker_DD4hep_compatible_2021_02/trackerProdCuts.xml'/>
+    <Include ref='Geometry/TrackerSimData/data/PhaseII/Tracker_DD4hep_compatible_IT711_2023_05/pixelProdCuts.xml'/>
+    <Include ref='Geometry/TrackerSimData/data/trackerProdCutsBEAM.xml'/>
+    <Include ref='Geometry/EcalCommonData/data/eregalgo/2026/v2/eregalgo.xml'/>
+    <Include ref='Geometry/EcalCommonData/data/ectkcable/2026/v1/ectkcable.xml'/>
+    <Include ref='Geometry/EcalCommonData/data/ectkcablemat/2026/v2/ectkcablemat.xml'/>
+    <Include ref='Geometry/EcalCommonData/data/ebalgo.xml'/>
+    <Include ref='Geometry/EcalCommonData/data/ebcon/2021/v1/ebcon.xml'/>
+    <Include ref='Geometry/EcalCommonData/data/ebrot.xml'/>
+    <Include ref='Geometry/HcalCommonData/data/hcalrotations.xml'/>
+    <Include ref='Geometry/HcalCommonData/data/average/hcalforwardmaterial.xml'/>
+    <Include ref='Geometry/HcalCommonData/data/hcal/v2/hcalalgo.xml'/>
+    <Include ref='Geometry/HcalCommonData/data/hcalbarrelalgo.xml'/>
+    <Include ref='Geometry/HcalCommonData/data/hcalcablealgo/v2/hcalcablealgo.xml'/>
+    <Include ref='Geometry/HcalCommonData/data/hcalouteralgo/v1/hcalouteralgo.xml'/>
+    <Include ref='Geometry/HcalCommonData/data/hcalforwardalgo.xml'/>
+    <Include ref='Geometry/HcalCommonData/data/hcalSimNumbering/NoHE/v1/hcalSimNumbering.xml'/>
+    <Include ref='Geometry/HcalCommonData/data/hcalRecNumbering/NoHE/v2/hcalRecNumbering.xml'/>
+    <Include ref='Geometry/HGCalCommonData/data/hgcalMaterial/v2/hgcalMaterial.xml'/>
+    <Include ref='Geometry/HGCalCommonData/data/hgcal/v17/hgcal.xml'/>
+    <Include ref='Geometry/HGCalCommonData/data/hgcalcell/v17/hgcalcell.xml'/>
+    <Include ref='Geometry/HGCalCommonData/data/hgcalwafer/v17/hgcalwafer.xml'/>
+    <Include ref='Geometry/HGCalCommonData/data/hgcalEE/v17/hgcalEE.xml'/>
+    <Include ref='Geometry/HGCalCommonData/data/hgcalHEsil/v17/hgcalHEsil.xml'/>
+    <Include ref='Geometry/HGCalCommonData/data/hgcalHEmix/v17/hgcalHEmix.xml'/>
+    <Include ref='Geometry/HGCalCommonData/data/hgcalCons/v17/hgcalCons.xml'/>
+    <Include ref='Geometry/HGCalCommonData/data/hgcalConsData/v17/hgcalConsData.xml'/>
+    <Include ref='Geometry/ForwardCommonData/data/hfnose/v4/hfnose.xml'/>
+    <Include ref='Geometry/ForwardCommonData/data/hfnoseCell/v1/hfnoseCell.xml'/>
+    <Include ref='Geometry/ForwardCommonData/data/hfnoseWafer/v1/hfnoseWafer.xml'/>
+    <Include ref='Geometry/ForwardCommonData/data/hfnoseLayer/v2/hfnoseLayer.xml'/>
+    <Include ref='Geometry/ForwardCommonData/data/hfnoseCons/v1m/hfnoseCons.xml'/>
+    <Include ref='Geometry/MuonCommonData/data/mbCommon/2021/v1/mbCommon.xml'/>
+    <Include ref='Geometry/MuonCommonData/data/mb1/2015/v2/mb1.xml'/>
+    <Include ref='Geometry/MuonCommonData/data/mb2/2015/v2/mb2.xml'/>
+    <Include ref='Geometry/MuonCommonData/data/mb3/2015/v2/mb3.xml'/>
+    <Include ref='Geometry/MuonCommonData/data/mb4/2015/v2/mb4.xml'/>
+    <Include ref='Geometry/MuonCommonData/data/mb4Shield/2021/v1/mb4Shield.xml'/>
+    <Include ref='Geometry/MuonCommonData/data/muonYoke/2026/v3/muonYoke.xml'/>
+    <Include ref='Geometry/MuonCommonData/data/mf/2026/v8/mf.xml'/>
+    <Include ref='Geometry/MuonCommonData/data/csc/2021/v2/csc.xml'/>
+    <Include ref='Geometry/MuonCommonData/data/rpcf/2026/v3/rpcf.xml'/>
+    <Include ref='Geometry/MuonCommonData/data/gemf/TDR_BaseLine/gemf.xml'/>
+    <Include ref='Geometry/MuonCommonData/data/gem11/TDR_BaseLine/gem11.xml'/>
+    <Include ref='Geometry/MuonCommonData/data/gem21/2026/v1/gem21.xml'/>
+    <Include ref='Geometry/MuonCommonData/data/mfshield/2026/v6/mfshield.xml'/>
+    <Include ref='Geometry/MuonCommonData/data/ge0/TDR_Dev/v4/ge0.xml'/>
+    <Include ref='Geometry/MuonCommonData/data/ge0shield/2026/v1/ge0shield.xml'/>
+    <Include ref='Geometry/ForwardCommonData/data/forwardshield/2026/v4/forwardshield.xml'/>
+    <Include ref='Geometry/ForwardCommonData/data/zdcmaterials/2021/v1/zdcmaterials.xml'/>
+    <Include ref='Geometry/ForwardCommonData/data/lumimaterials.xml'/>
+    <Include ref='Geometry/ForwardCommonData/data/zdcrotations.xml'/>
+    <Include ref='Geometry/ForwardCommonData/data/lumirotations.xml'/>
+    <Include ref='Geometry/ForwardCommonData/data/zdc/2026/v1/zdc.xml'/>
+    <Include ref='Geometry/ForwardCommonData/data/zdclumi/2021/v2/zdclumi.xml'/>
+    <Include ref='Geometry/ForwardCommonData/data/cmszdc.xml'/>
+    <Include ref='Geometry/MTDCommonData/data/mtdMaterial/v3/mtdMaterial.xml'/>
+    <Include ref='Geometry/MTDCommonData/data/btl/v3/btl.xml'/>
+    <Include ref='Geometry/MTDCommonData/data/etl/v8/etl.xml'/>
+    <Include ref='Geometry/MTDCommonData/data/mtdParameters/v5/mtdStructureTopology.xml'/>
+    <Include ref='Geometry/MTDCommonData/data/mtdParameters/v5/mtdParameters.xml'/>
+    <Include ref='Geometry/MuonCommonData/data/muonNumbering/TDR_DeV/v5/muonNumbering.xml'/>
+    <Include ref='Geometry/EcalSimData/data/PhaseII/ecalsens.xml'/>
+    <Include ref='Geometry/HcalCommonData/data/hcalsens/NoHE/v1/hcalsenspmf.xml'/>
+    <Include ref='Geometry/HcalSimData/data/hf.xml'/>
+    <Include ref='Geometry/HcalSimData/data/hfpmt.xml'/>
+    <Include ref='Geometry/HcalSimData/data/hffibrebundle.xml'/>
+    <Include ref='Geometry/HcalSimData/data/CaloUtil/2026/v5c/CaloUtil.xml'/>
+    <Include ref='Geometry/HGCalSimData/data/hgcsensv15.xml'/>
+    <Include ref='Geometry/ForwardSimData/data/hfnosesens.xml'/>
+    <Include ref='Geometry/MuonSimData/data/PhaseII/v2/muonSens.xml'/>
+    <Include ref='Geometry/DTGeometryBuilder/data/dtSpecsFilter/2021/v1/dtSpecsFilter.xml'/>
+    <Include ref='Geometry/CSCGeometryBuilder/data/cscSpecsFilter.xml'/>
+    <Include ref='Geometry/CSCGeometryBuilder/data/cscSpecs.xml'/>
+    <Include ref='Geometry/RPCGeometryBuilder/data/2026/v1/RPCSpecs.xml'/>
+    <Include ref='Geometry/GEMGeometryBuilder/data/v12/GEMSpecsFilter.xml'/>
+    <Include ref='Geometry/GEMGeometryBuilder/data/v12/GEMSpecs.xml'/>
+    <Include ref='Geometry/ForwardSimData/data/zdcsens.xml'/>
+    <Include ref='Geometry/MTDSimData/data/v5/mtdsens.xml'/>
+    <Include ref='Geometry/HcalSimData/data/HcalProdCuts/2026/v1/HcalProdCuts.xml'/>
+    <Include ref='Geometry/EcalSimData/data/EcalProdCuts.xml'/>
+    <Include ref='Geometry/HGCalSimData/data/hgcProdCutsv15.xml'/>
+    <Include ref='Geometry/ForwardSimData/data/hfnoseProdCuts.xml'/>
+    <Include ref='Geometry/MuonSimData/data/muonProdCuts/2026/v2/muonProdCuts.xml'/>
+    <Include ref='Geometry/ForwardSimData/data/zdcProdCuts/2021/v2/zdcProdCuts.xml'/>
+    <Include ref='Geometry/ForwardSimData/data/ForwardShieldProdCuts.xml'/>
+    <Include ref='Geometry/MTDSimData/data/v5/mtdProdCuts.xml'/>
+    <Include ref='Geometry/CMSCommonData/data/FieldParameters.xml'/>
+  </IncludeSection>
+</DDDefinition>
diff --git a/Geometry/CMSCommonData/python/cmsExtendedGeometry2026D115XML_cfi.py b/Geometry/CMSCommonData/python/cmsExtendedGeometry2026D115XML_cfi.py
new file mode 100644
index 0000000000000..4f1b74801160a
--- /dev/null
+++ b/Geometry/CMSCommonData/python/cmsExtendedGeometry2026D115XML_cfi.py
@@ -0,0 +1,134 @@
+import FWCore.ParameterSet.Config as cms
+
+# This config was generated automatically using generate2026Geometry.py
+# If you notice a mistake, please update the generating script, not just this config
+
+XMLIdealGeometryESSource = cms.ESSource("XMLIdealGeometryESSource",
+    geomXMLFiles = cms.vstring(
+        'Geometry/CMSCommonData/data/materials/2021/v1/materials.xml',
+        'Geometry/CMSCommonData/data/rotations.xml',
+        'Geometry/CMSCommonData/data/extend/v2/cmsextent.xml',
+        'Geometry/CMSCommonData/data/cavernData/2021/v1/cavernData.xml',
+        'Geometry/CMSCommonData/data/cms/2026/v5/cms.xml',
+        'Geometry/CMSCommonData/data/cmsMother.xml',
+        'Geometry/CMSCommonData/data/eta3/etaMax.xml',
+        'Geometry/CMSCommonData/data/cmsTracker.xml',
+        'Geometry/CMSCommonData/data/caloBase/2026/v7/caloBase.xml',
+        'Geometry/CMSCommonData/data/cmsCalo.xml',
+        'Geometry/CMSCommonData/data/muonBase/2026/v5/muonBase.xml',
+        'Geometry/CMSCommonData/data/cmsMuon.xml',
+        'Geometry/CMSCommonData/data/mgnt.xml',
+        'Geometry/CMSCommonData/data/beampipe/2026/v3/beampipe.xml',
+        'Geometry/CMSCommonData/data/cmsBeam/2026/v1/cmsBeam.xml',
+        'Geometry/CMSCommonData/data/muonMB.xml',
+        'Geometry/CMSCommonData/data/muonMagnet.xml',
+        'Geometry/CMSCommonData/data/cavern/2021/v1/cavern.xml',
+        'Geometry/CMSCommonData/data/cavernFloor/2017/v1/cavernFloor.xml',
+        'Geometry/TrackerCommonData/data/PhaseII/trackerParameters.xml',
+        'Geometry/TrackerCommonData/data/pixfwdCommon.xml',
+        'Geometry/TrackerCommonData/data/PhaseII/Tracker_DD4hep_compatible_2021_02/pixfwd.xml',
+        'Geometry/TrackerCommonData/data/PhaseII/Tracker_DD4hep_compatible_OT800_IT615_2022_10/pixbar.xml',
+        'Geometry/TrackerCommonData/data/trackermaterial.xml',
+        'Geometry/TrackerCommonData/data/PhaseII/Tracker_DD4hep_compatible_2021_03/tracker.xml',
+        'Geometry/TrackerCommonData/data/PhaseII/OuterTracker616_2020_04/otst.xml',
+        'Geometry/TrackerCommonData/data/PhaseII/Tracker_DD4hep_compatible_IT711_2023_05/pixel.xml',
+        'Geometry/TrackerCommonData/data/PhaseII/TiltedTracker404/trackerbar.xml',
+        'Geometry/TrackerCommonData/data/PhaseII/TiltedTracker404/trackerfwd.xml',
+        'Geometry/TrackerCommonData/data/PhaseII/Tracker_DD4hep_compatible_2021_02/trackerStructureTopology.xml',
+        'Geometry/TrackerCommonData/data/PhaseII/Tracker_DD4hep_compatible_IT711_2023_05/pixelStructureTopology.xml',
+        'Geometry/TrackerSimData/data/PhaseII/Tracker_DD4hep_compatible_2021_02/trackersens.xml',
+        'Geometry/TrackerSimData/data/PhaseII/Tracker_DD4hep_compatible_IT711_2023_05/pixelsens.xml',
+        'Geometry/TrackerRecoData/data/PhaseII/Tracker_DD4hep_compatible_IT711_2023_05/trackerRecoMaterial.xml',
+        'Geometry/TrackerSimData/data/PhaseII/Tracker_DD4hep_compatible_2021_02/trackerProdCuts.xml',
+        'Geometry/TrackerSimData/data/PhaseII/Tracker_DD4hep_compatible_IT711_2023_05/pixelProdCuts.xml',
+        'Geometry/TrackerSimData/data/trackerProdCutsBEAM.xml',
+        'Geometry/EcalCommonData/data/eregalgo/2026/v2/eregalgo.xml',
+        'Geometry/EcalCommonData/data/ectkcable/2026/v1/ectkcable.xml',
+        'Geometry/EcalCommonData/data/ectkcablemat/2026/v2/ectkcablemat.xml',
+        'Geometry/EcalCommonData/data/ebalgo.xml',
+        'Geometry/EcalCommonData/data/ebcon/2021/v1/ebcon.xml',
+        'Geometry/EcalCommonData/data/ebrot.xml',
+        'Geometry/HcalCommonData/data/hcalrotations.xml',
+        'Geometry/HcalCommonData/data/average/hcalforwardmaterial.xml',
+        'Geometry/HcalCommonData/data/hcal/v2/hcalalgo.xml',
+        'Geometry/HcalCommonData/data/hcalbarrelalgo.xml',
+        'Geometry/HcalCommonData/data/hcalcablealgo/v2/hcalcablealgo.xml',
+        'Geometry/HcalCommonData/data/hcalouteralgo/v1/hcalouteralgo.xml',
+        'Geometry/HcalCommonData/data/hcalforwardalgo.xml',
+        'Geometry/HcalCommonData/data/hcalSimNumbering/NoHE/v1/hcalSimNumbering.xml',
+        'Geometry/HcalCommonData/data/hcalRecNumbering/NoHE/v2/hcalRecNumbering.xml',
+        'Geometry/HGCalCommonData/data/hgcalMaterial/v2/hgcalMaterial.xml',
+        'Geometry/HGCalCommonData/data/hgcal/v17/hgcal.xml',
+        'Geometry/HGCalCommonData/data/hgcalcell/v17/hgcalcell.xml',
+        'Geometry/HGCalCommonData/data/hgcalwafer/v17/hgcalwafer.xml',
+        'Geometry/HGCalCommonData/data/hgcalEE/v17/hgcalEE.xml',
+        'Geometry/HGCalCommonData/data/hgcalHEsil/v17/hgcalHEsil.xml',
+        'Geometry/HGCalCommonData/data/hgcalHEmix/v17/hgcalHEmix.xml',
+        'Geometry/HGCalCommonData/data/hgcalCons/v17/hgcalCons.xml',
+        'Geometry/HGCalCommonData/data/hgcalConsData/v17/hgcalConsData.xml',
+        'Geometry/ForwardCommonData/data/hfnose/v4/hfnose.xml',
+        'Geometry/ForwardCommonData/data/hfnoseCell/v1/hfnoseCell.xml',
+        'Geometry/ForwardCommonData/data/hfnoseWafer/v1/hfnoseWafer.xml',
+        'Geometry/ForwardCommonData/data/hfnoseLayer/v2/hfnoseLayer.xml',
+        'Geometry/ForwardCommonData/data/hfnoseCons/v1m/hfnoseCons.xml',
+        'Geometry/MuonCommonData/data/mbCommon/2021/v1/mbCommon.xml',
+        'Geometry/MuonCommonData/data/mb1/2015/v2/mb1.xml',
+        'Geometry/MuonCommonData/data/mb2/2015/v2/mb2.xml',
+        'Geometry/MuonCommonData/data/mb3/2015/v2/mb3.xml',
+        'Geometry/MuonCommonData/data/mb4/2015/v2/mb4.xml',
+        'Geometry/MuonCommonData/data/mb4Shield/2021/v1/mb4Shield.xml',
+        'Geometry/MuonCommonData/data/muonYoke/2026/v3/muonYoke.xml',
+        'Geometry/MuonCommonData/data/mf/2026/v8/mf.xml',
+        'Geometry/MuonCommonData/data/csc/2021/v2/csc.xml',
+        'Geometry/MuonCommonData/data/rpcf/2026/v3/rpcf.xml',
+        'Geometry/MuonCommonData/data/gemf/TDR_BaseLine/gemf.xml',
+        'Geometry/MuonCommonData/data/gem11/TDR_BaseLine/gem11.xml',
+        'Geometry/MuonCommonData/data/gem21/2026/v1/gem21.xml',
+        'Geometry/MuonCommonData/data/mfshield/2026/v6/mfshield.xml',
+        'Geometry/MuonCommonData/data/ge0/TDR_Dev/v4/ge0.xml',
+        'Geometry/MuonCommonData/data/ge0shield/2026/v1/ge0shield.xml',
+        'Geometry/ForwardCommonData/data/forwardshield/2026/v4/forwardshield.xml',
+        'Geometry/ForwardCommonData/data/zdcmaterials/2021/v1/zdcmaterials.xml',
+        'Geometry/ForwardCommonData/data/lumimaterials.xml',
+        'Geometry/ForwardCommonData/data/zdcrotations.xml',
+        'Geometry/ForwardCommonData/data/lumirotations.xml',
+        'Geometry/ForwardCommonData/data/zdc/2026/v1/zdc.xml',
+        'Geometry/ForwardCommonData/data/zdclumi/2021/v2/zdclumi.xml',
+        'Geometry/ForwardCommonData/data/cmszdc.xml',
+        'Geometry/MTDCommonData/data/mtdMaterial/v3/mtdMaterial.xml',
+        'Geometry/MTDCommonData/data/btl/v3/btl.xml',
+        'Geometry/MTDCommonData/data/etl/v8/etl.xml',
+        'Geometry/MTDCommonData/data/mtdParameters/v5/mtdStructureTopology.xml',
+        'Geometry/MTDCommonData/data/mtdParameters/v5/mtdParameters.xml',
+    )+
+    cms.vstring(
+        'Geometry/MuonCommonData/data/muonNumbering/TDR_DeV/v5/muonNumbering.xml',
+        'Geometry/EcalSimData/data/PhaseII/ecalsens.xml',
+        'Geometry/HcalCommonData/data/hcalsens/NoHE/v1/hcalsenspmf.xml',
+        'Geometry/HcalSimData/data/hf.xml',
+        'Geometry/HcalSimData/data/hfpmt.xml',
+        'Geometry/HcalSimData/data/hffibrebundle.xml',
+        'Geometry/HcalSimData/data/CaloUtil/2026/v5c/CaloUtil.xml',
+        'Geometry/HGCalSimData/data/hgcsensv15.xml',
+        'Geometry/ForwardSimData/data/hfnosesens.xml',
+        'Geometry/MuonSimData/data/PhaseII/v2/muonSens.xml',
+        'Geometry/DTGeometryBuilder/data/dtSpecsFilter/2021/v1/dtSpecsFilter.xml',
+        'Geometry/CSCGeometryBuilder/data/cscSpecsFilter.xml',
+        'Geometry/CSCGeometryBuilder/data/cscSpecs.xml',
+        'Geometry/RPCGeometryBuilder/data/2026/v1/RPCSpecs.xml',
+        'Geometry/GEMGeometryBuilder/data/v12/GEMSpecsFilter.xml',
+        'Geometry/GEMGeometryBuilder/data/v12/GEMSpecs.xml',
+        'Geometry/ForwardSimData/data/zdcsens.xml',
+        'Geometry/MTDSimData/data/v5/mtdsens.xml',
+        'Geometry/HcalSimData/data/HcalProdCuts/2026/v1/HcalProdCuts.xml',
+        'Geometry/EcalSimData/data/EcalProdCuts.xml',
+        'Geometry/HGCalSimData/data/hgcProdCutsv15.xml',
+        'Geometry/ForwardSimData/data/hfnoseProdCuts.xml',
+        'Geometry/MuonSimData/data/muonProdCuts/2026/v2/muonProdCuts.xml',
+        'Geometry/ForwardSimData/data/zdcProdCuts/2021/v2/zdcProdCuts.xml',
+        'Geometry/ForwardSimData/data/ForwardShieldProdCuts.xml',
+        'Geometry/MTDSimData/data/v5/mtdProdCuts.xml',
+        'Geometry/CMSCommonData/data/FieldParameters.xml',
+    ),
+    rootNodeName = cms.string('cms:OCMS')
+)