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	Component	Affected version	Patched versions
debian 12	python-urllib3	=1.26.12-1 \|\| =1.26.12-1+deb12u1 \|\| =1.26.12-1+deb12u2 \|\| =1.26.12-1+deb12u3 \|\| >=0 <1.26.12-1+deb12u4	1.26.12-1+deb12u4
rpm rhel7	python-s3transfer	-	-
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 \|\| >=0 <2.7.0-1	2.7.0-1
pypi	urllib3	>=1.23 <2.7.0	2.7.0
rpm rhel8	python3.12-urllib3	<0:1.26.19-3.el8_10	0:1.26.19-3.el8_10
rpm rhel8	resource-agents	<0:4.9.0-54.el8_10.36	0:4.9.0-54.el8_10.36
rpm rhel8	fence-agents	<0:4.2.1-129.el8_10.28	0:4.2.1-129.el8_10.28
debian 13	python-urllib3	=2.3.0-3 \|\| =2.3.0-3+deb13u1 \|\| >=0 <2.3.0-3+deb13u2	2.3.0-3+deb13u2
rpm rhel9	python3.12-urllib3	<0:1.26.19-3.el9_8	0:1.26.19-3.el9_8
rpm rhel10	python-urllib3	<0:1.26.19-4.el10_2	0:1.26.19-4.el10_2

1-10 of 19

Aliases

1. CVE-2026-444312. NVD-2026-444313. OSV-DEBIAN-2026-444314. OSV-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

Does your application use this vulnerable software?

During the free trial, our tools assess your application, identify vulnerabilities, and provide recommendations for their remediation.