CVE-2025-50182

NameCVE-2025-50182
Descriptionurllib3 is a user-friendly HTTP client library for Python. Starting in version 2.2.0 and prior to 2.5.0, urllib3 does not control redirects in browsers and Node.js. urllib3 supports being used in a Pyodide runtime utilizing the JavaScript Fetch API or falling back on XMLHttpRequest. This means Python libraries can be used to make HTTP requests from a browser or Node.js. Additionally, urllib3 provides a mechanism to control redirects, but the retries and redirect parameters are ignored with Pyodide; the runtime itself determines redirect behavior. This issue has been patched in version 2.5.0.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs1108077

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
python-urllib3 (PTS)bullseye1.26.5-1~exp1vulnerable
bullseye (security)1.26.5-1~exp1+deb11u1vulnerable
bookworm1.26.12-1+deb12u1vulnerable
trixie, sid2.3.0-2vulnerable

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
python-urllib3source(unstable)(unfixed)1108077

Notes

[bookworm] - python-urllib3 <no-dsa> (Minor issue)
[bullseye] - python-urllib3 <postponed> (Minor issue)
https://github.com/urllib3/urllib3/security/advisories/GHSA-48p4-8xcf-vxj5
https://github.com/urllib3/urllib3/commit/7eb4a2aafe49a279c29b6d1f0ed0f42e9736194f (2.5.0)

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