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18impact

pip doesn't reject concatenated ZIP and tar archives

Python Packaging Authority pip · CVE-2026-3219
0 news outlets0 CERTs and agencies0 researchers

What is it?

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.

Evidence

No coverage recorded yet.

Exploitation

  • Public proof of concept
  • Exploited in the wild
  • Listed as known exploited
CVSS
4.6
EPSS
0.1%
First seen
9 h ago
Status
corroborated

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