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CVE-2025-50181

urllib3 redirects are not disabled when retries are disabled on PoolManager instantiation

Published: Jun 19, 2025Updated: Dec 22, 2025 Sources: CVE List NVD GHSA BDUCWE-601
NVD MITRE
5.3CVSSMEDIUM
EPSS Score
0.3%
Top 74.3%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

urllib3 is a user-friendly HTTP client library for Python. Prior to 2.5.0, it is possible to disable redirects for all requests by instantiating a PoolManager and specifying retries in a way that disable redirects. By default, requests and botocore users are not affected. An application attempting to mitigate SSRF or open redirect vulnerabilities by disabling redirects at the PoolManager level will remain vulnerable. This issue has been patched in version 2.5.0.

CVSS Vector Breakdown

AV:NAC:HPR:LUI:NS:UC:HI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:NAvailability
None
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Weaknesses

CWE-601

Affected Products

urllib3urllib3
Library
OSS Libraries / pypi
urllib3pythonOSS Libraries
Red Hat Enterprise LinuxRed Hat Inc.
On-premOS
Operating Systems / linux-distro
UbuntuCanonical Ltd.
On-premOS
Operating Systems / linux-distro
Red Hat QuayRed Hat Inc.
On-premWeb App
DevTools & CI / artifact-registry
urllib3oss-projectOSS Librariesaka urllib3
pythonoss-projectUSOSS Libraries
red hat inc.commercialUSOperating Systemsaka red hat
canonical ltd.commercialGBOperating Systemsaka canonical
and 25 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Initial Access
View detailed technique mapping

References

https://github.com/urllib3/urllib3/security/advisories/GHSA-pq67-6m6q-mj2v
github.com
https://github.com/urllib3/urllib3/commit/f05b1329126d5be6de501f9d1e3e36738bc08857
github.com
https://github.com/urllib3/urllib3/releases/tag/2.5.0
github.com
and 11 more references View all →

Timeline

Published
Jun 19, 2025
Last Updated
Dec 22, 2025

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