CVE-2026-3219

EUVD-2026-23866
pip handles concatenated tar and ZIP files as ZIP files regardless of filename or whether a file is both a tar and ZIP file. This behavior could result in confusing installation behavior, such as installing "incorrect" files according to the filename of the archive. New behavior only proceeds with installation if the file identifies uniquely as a ZIP or tar archive, not as both.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
UNKNOWN
---
Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: 5%
Debian logo
Debian Releases
Debian Product
Codename
python-pip
bookworm
no-dsa
bullseye
postponed
bullseye (security)
vulnerable
forky
26.1.1+dfsg-1
fixed
sid
26.1.2+dfsg-1
fixed
trixie
no-dsa
Common Weakness Enumeration
References
https://github.com/pypa/pip/pull/13870
https://mail.python.org/archives/list/security-announce@python.org/thread/QAJ5JIVWWCAJ4EZL2FP5MOOW35JS7LRJ/
http://www.openwall.com/lists/oss-security/2026/04/20/8