CVE-2025-50181

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

CVSS 5.3 MEDIUMEPSS 0.4%CWE-601

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:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Affected products

urllib3 · urllib3

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References

https://github.com/urllib3/urllib3/commit/f05b1329126d5be6de501f9d1e3e36738bc08857 https://github.com/urllib3/urllib3/releases/tag/2.5.0 https://github.com/urllib3/urllib3/security/advisories/GHSA-pq67-6m6q-mj2v