Fluid Attacks Database

Description

urllib3 is an HTTP client library for Python. From 1.23 to before 2.7.0, cross-origin redirects followed from the low-level API via ProxyManager.connection_from_url().urlopen(..., assert_same_host=False) still forward these sensitive headers. This vulnerability is fixed in 2.7.0.

Mitigation

Update Impact

Minimal update. May introduce new vulnerabilities or breaking changes.

Ecosystem	Package	Affected version	Patched versions
pypi	urllib3	>=1.23 <2.7.0	2.7.0
debian 11	python-urllib3	=1.26.12-1 \|\| =1.26.16-1 \|\| =1.26.17-1 \|\| =1.26.18-1 \|\| =1.26.18-2 \|\| =1.26.5-1~exp1 \|\| =1.26.5-1~exp1+deb11u1 \|\| =1.26.5-1~exp1+deb11u2 \|\| =1.26.5-1~exp1+deb11u3 \|\| =1.26.8-1 \|\| =1.26.9-1 \|\| =2.0.7-1 \|\| =2.0.7-2 \|\| =2.2.3-1 \|\| =2.2.3-2 \|\| =2.2.3-3 \|\| =2.2.3-4 \|\| =2.3.0-1 \|\| =2.3.0-2 \|\| =2.3.0-3 \|\| =2.5.0-1 \|\| =2.5.0-1.1 \|\| =2.5.0-2 \|\| =2.6.3-1 \|\| =2.6.3-2	-
debian 12	python-urllib3	=1.26.12-1 \|\| =1.26.12-1+deb12u1 \|\| =1.26.12-1+deb12u2 \|\| =1.26.12-1+deb12u3 \|\| =1.26.16-1 \|\| =1.26.17-1 \|\| =1.26.18-1 \|\| =1.26.18-2 \|\| =2.0.7-1 \|\| =2.0.7-2 \|\| =2.2.3-1 \|\| =2.2.3-2 \|\| =2.2.3-3 \|\| =2.2.3-4 \|\| =2.3.0-1 \|\| =2.3.0-2 \|\| =2.3.0-3 \|\| =2.5.0-1 \|\| =2.5.0-1.1 \|\| =2.5.0-2 \|\| =2.6.3-1 \|\| =2.6.3-2	-
debian 14	python-urllib3	=2.3.0-3 \|\| =2.5.0-1 \|\| =2.5.0-1.1 \|\| =2.5.0-2 \|\| =2.6.3-1 \|\| =2.6.3-2	-
debian 13	python-urllib3	=2.3.0-3 \|\| =2.3.0-3+deb13u1 \|\| =2.5.0-1 \|\| =2.5.0-1.1 \|\| =2.5.0-2 \|\| =2.6.3-1 \|\| =2.6.3-2	-
rpm rhel8	fence-agents	-	-
rpm rhel7	python-s3transfer	-	-
rpm rhel8	resource-agents	-	-
rpm rhel9	fence-agents	-	-

Aliases

1. CVE-2026-444312. NVD-2026-444313. OSV-2026-444314. OSV-DEBIAN-2026-444315. GHSA-qccp-gfcp-xxvc6. GCVE-2026-444317. SECURITY-TRACKER-CVE-2026-44431

References

1. https://github.com/urllib3/urllib3/security/advisories/GHSA-qccp-gfcp-xxvc

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