diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4932a8c8..37fd688d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,13 @@
 Changelog
 =========
 
+## v6.26.2 (17 January 2024)
+
+### Fixes
+
+* Fix unhandled `URI::InvalidURIError` in `Cleaner#clean_url`
+  | [#811](https://github.com/bugsnag/bugsnag-ruby/pull/811)
+
 ## v6.26.1 (9 January 2024)
 
 ### Fixes
diff --git a/VERSION b/VERSION
index 0e10c8e2..dde9f42f 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-6.26.1
+6.26.2
diff --git a/lib/bugsnag/cleaner.rb b/lib/bugsnag/cleaner.rb
index 75b7383c..600ba8e1 100644
--- a/lib/bugsnag/cleaner.rb
+++ b/lib/bugsnag/cleaner.rb
@@ -26,8 +26,16 @@ def clean_object(object)
     # @return [String]
     def clean_url(url)
       return url if @configuration.meta_data_filters.empty? && @configuration.redacted_keys.empty?
+      return url unless url.include?('?')
+
+      begin
+        uri = URI(url)
+      rescue URI::InvalidURIError
+        pre_query_string, _query_string = url.split('?', 2)
+
+        return "#{pre_query_string}?#{FILTERED}"
+      end
 
-      uri = URI(url)
       return url unless uri.query
 
       query_params = uri.query.split('&').map { |pair| pair.split('=') }
diff --git a/spec/cleaner_spec.rb b/spec/cleaner_spec.rb
index df33c449..f6908dbe 100644
--- a/spec/cleaner_spec.rb
+++ b/spec/cleaner_spec.rb
@@ -540,5 +540,17 @@ def to_s
       let(:url) { "https://host.example/sessions?access_token=abc123" }
       it { should eq "https://host.example/sessions?access_token=[FILTERED]" }
     end
+
+    context "with an invalid URL" do
+      let(:filters) { [/token/] }
+      let(:url) { "https://host.example/a b c d e f g?access_token=abc123&password=secret&token2=xyz987" }
+      it { should eq "https://host.example/a b c d e f g?[FILTERED]" }
+    end
+
+    context "with an invalid URL and no query string" do
+      let(:filters) { [/token/] }
+      let(:url) { "https://host.example/a b c d e f g" }
+      it { should eq "https://host.example/a b c d e f g" }
+    end
   end
 end