CVE catalog

CVE-2025-50182

urllib3 vulnerabilities

Severity: Medium · CVSS 5.3CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Published: Jun 18, 2025, 5:50:11 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.60% · Oct 25, 2026

urllib3 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.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	python-urllib3	sid	`2.8.0-2`	fixed
Debian	python-urllib3	forky	`2.8.0-2`	fixed
Debian	python-urllib3	trixie	`2.3.0-3+deb13u2`	fixed
Debian	python-urllib3	trixie-security	`2.3.0-3+deb13u2`	fixed
Debian	python-urllib3	bookworm	`1.26.12-1+deb12u4`	not affected
Debian	python-urllib3	bookworm-security	`1.26.12-1+deb12u4`	not affected
Ubuntu	python-urllib3	noble	`2.0.7-1ubuntu0.2`	fixed
Ubuntu	python3-urllib3	noble	`2.0.7-1ubuntu0.2`	fixed
PyPI	urllib3	Not reported	`2.5.0`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	python-urllib3	source	sid	`2.3.0-3`	not yet assigned	Not reported	[1108077]
Debian	python-urllib3	source	forky	`2.3.0-3`	not yet assigned	Not reported	[1108077]
Debian	python-urllib3	source	trixie	`2.3.0-3`	not yet assigned	Not reported	[1108077]
Debian	python-urllib3	source	bookworm	`Not affected`	unimportant	Not reported	[1108077]
Ubuntu	python-urllib3	deb	noble	`2.0.7-1ubuntu0.2`	Not reported	Not reported	Not reported
Ubuntu	python3-urllib3	deb	noble	`2.0.7-1ubuntu0.2`	Not reported	Not reported	Not reported
PyPI	urllib3	PyPI	Not reported	`2.5.0`	Not reported	GHSA-48P4-8XCF-VXJ5	Not reported

[Debian bug #1108077]

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[python3-urllib3]Not affected
Source package: [python-urllib3]
Details (4)
- 1.26.12-1+deb12u4 · all · bookworm
  Not affected
  usn · python-urllib3 · debian · bookworm
- 1.26.12-1+deb12u4 · all · bookworm
  Not affected
  usn · python-urllib3 · debian · bookworm
- 1.26.12-1+deb12u4 · all · bookworm-security
  Not affected
  usn · python-urllib3 · debian · bookworm
- 1.26.12-1+deb12u4 · all · bookworm-security
  Not affected
  usn · python-urllib3 · debian · bookworm

[Debian 13 (Trixie)]

[python3-urllib3]Fixed
Source package: [python-urllib3]
Details (4)
- 2.3.0-3+deb13u2 · all · trixie
  Fixed · Fixed: 2.3.0-3
  usn · python-urllib3 · debian · 13
- 2.3.0-3+deb13u2 · all · trixie
  Fixed · Fixed: 2.3.0-3
  usn · python-urllib3 · debian · 13
- 2.3.0-3+deb13u2 · all · trixie-security
  Fixed · Fixed: 2.3.0-3
  usn · python-urllib3 · debian · 13
- 2.3.0-3+deb13u2 · all · trixie-security
  Fixed · Fixed: 2.3.0-3
  usn · python-urllib3 · debian · 13

Observed: Oct 27, 2026, 1:32:32 PM UTC

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX] · [Ubuntu Security Notices (USN)]