diff --git a/src/poetry/publishing/uploader.py b/src/poetry/publishing/uploader.py
index 99557561c3f..bed6b1f5928 100644
--- a/src/poetry/publishing/uploader.py
+++ b/src/poetry/publishing/uploader.py
@@ -22,6 +22,7 @@
 from urllib3 import util
 
 from poetry.__version__ import __version__
+from poetry.utils.constants import REQUESTS_TIMEOUT
 from poetry.utils.patterns import wheel_file_re
 
 
@@ -262,6 +263,7 @@ def _upload_file(
                         data=monitor,
                         allow_redirects=False,
                         headers={"Content-Type": monitor.content_type},
+                        timeout=REQUESTS_TIMEOUT,
                     )
                 if resp is None or 200 <= resp.status_code < 300:
                     bar.set_format(
@@ -320,6 +322,7 @@ def _register(self, session: requests.Session, url: str) -> requests.Response:
             data=encoder,
             allow_redirects=False,
             headers={"Content-Type": encoder.content_type},
+            timeout=REQUESTS_TIMEOUT,
         )
 
         resp.raise_for_status()
diff --git a/src/poetry/repositories/http.py b/src/poetry/repositories/http.py
index 8d413b6c0e9..3265ba9c805 100644
--- a/src/poetry/repositories/http.py
+++ b/src/poetry/repositories/http.py
@@ -24,6 +24,7 @@
 from poetry.repositories.exceptions import RepositoryError
 from poetry.repositories.link_sources.html import HTMLPage
 from poetry.utils.authenticator import Authenticator
+from poetry.utils.constants import REQUESTS_TIMEOUT
 from poetry.utils.helpers import download_file
 from poetry.utils.patterns import wheel_file_re
 
@@ -260,7 +261,9 @@ def _links_to_data(self, links: list[Link], data: PackageInfo) -> dict[str, Any]
     def _get_response(self, endpoint: str) -> requests.Response | None:
         url = self._url + endpoint
         try:
-            response: requests.Response = self.session.get(url, raise_for_status=False)
+            response: requests.Response = self.session.get(
+                url, raise_for_status=False, timeout=REQUESTS_TIMEOUT
+            )
             if response.status_code in (401, 403):
                 self._log(
                     f"Authorization error accessing {url}",
diff --git a/src/poetry/repositories/pypi_repository.py b/src/poetry/repositories/pypi_repository.py
index c42cdc31a67..0e5beab6360 100644
--- a/src/poetry/repositories/pypi_repository.py
+++ b/src/poetry/repositories/pypi_repository.py
@@ -17,6 +17,7 @@
 from poetry.repositories.exceptions import PackageNotFound
 from poetry.repositories.http import HTTPRepository
 from poetry.utils._compat import to_str
+from poetry.utils.constants import REQUESTS_TIMEOUT
 
 
 cache_control_logger.setLevel(logging.ERROR)
@@ -103,7 +104,9 @@ def search(self, query: str) -> list[Package]:
 
         search = {"q": query}
 
-        response = requests.session().get(self._base_url + "search", params=search)
+        response = requests.session().get(
+            self._base_url + "search", params=search, timeout=REQUESTS_TIMEOUT
+        )
         content = parse(response.content, namespaceHTMLElements=False)
         for result in content.findall(".//*[@class='package-snippet']"):
             name_element = result.find("h3/*[@class='package-snippet__name']")
@@ -244,14 +247,18 @@ def _get_release_info(
     def _get(self, endpoint: str) -> dict[str, Any] | None:
         try:
             json_response = self.session.get(
-                self._base_url + endpoint, raise_for_status=False
+                self._base_url + endpoint,
+                raise_for_status=False,
+                timeout=REQUESTS_TIMEOUT,
             )
         except requests.exceptions.TooManyRedirects:
             # Cache control redirect loop.
             # We try to remove the cache and try again
             self.session.delete_cache(self._base_url + endpoint)
             json_response = self.session.get(
-                self._base_url + endpoint, raise_for_status=False
+                self._base_url + endpoint,
+                raise_for_status=False,
+                timeout=REQUESTS_TIMEOUT,
             )
 
         if json_response.status_code != 200:
diff --git a/src/poetry/utils/authenticator.py b/src/poetry/utils/authenticator.py
index 81ab081b934..fbcb25ea502 100644
--- a/src/poetry/utils/authenticator.py
+++ b/src/poetry/utils/authenticator.py
@@ -21,6 +21,7 @@
 
 from poetry.config.config import Config
 from poetry.exceptions import PoetryException
+from poetry.utils.constants import REQUESTS_TIMEOUT
 from poetry.utils.password_manager import HTTPAuthCredential
 from poetry.utils.password_manager import PasswordManager
 
@@ -219,7 +220,7 @@ def request(
 
         # Send the request.
         send_kwargs = {
-            "timeout": kwargs.get("timeout"),
+            "timeout": kwargs.get("timeout", REQUESTS_TIMEOUT),
             "allow_redirects": kwargs.get("allow_redirects", True),
         }
         send_kwargs.update(settings)
diff --git a/src/poetry/utils/constants.py b/src/poetry/utils/constants.py
new file mode 100644
index 00000000000..0f799b16d7d
--- /dev/null
+++ b/src/poetry/utils/constants.py
@@ -0,0 +1,5 @@
+from __future__ import annotations
+
+
+# Timeout for HTTP requests using the requests library.
+REQUESTS_TIMEOUT = 15
diff --git a/src/poetry/utils/helpers.py b/src/poetry/utils/helpers.py
index dd7806f3ed4..7ddc0d6f0df 100644
--- a/src/poetry/utils/helpers.py
+++ b/src/poetry/utils/helpers.py
@@ -13,6 +13,8 @@
 from typing import Iterator
 from typing import Mapping
 
+from poetry.utils.constants import REQUESTS_TIMEOUT
+
 
 if TYPE_CHECKING:
     from collections.abc import Callable
@@ -89,7 +91,7 @@ def download_file(
 
     get = requests.get if not session else session.get
 
-    response = get(url, stream=True)
+    response = get(url, stream=True, timeout=REQUESTS_TIMEOUT)
     response.raise_for_status()
 
     set_indicator = False
diff --git a/tests/repositories/test_legacy_repository.py b/tests/repositories/test_legacy_repository.py
index bb0c33f6a76..cda8325ba05 100644
--- a/tests/repositories/test_legacy_repository.py
+++ b/tests/repositories/test_legacy_repository.py
@@ -426,7 +426,9 @@ def test_get_redirected_response_url(
     repo = MockHttpRepository({"/foo": 200}, http)
     redirect_url = "http://legacy.redirect.bar"
 
-    def get_mock(url: str, raise_for_status: bool = True) -> requests.Response:
+    def get_mock(
+        url: str, raise_for_status: bool = True, timeout: int = 5
+    ) -> requests.Response:
         response = requests.Response()
         response.status_code = 200
         response.url = redirect_url + "/foo"