Medium

zipp Denial of Service vulnerability

  • Disclosed: 09.07.2024
  • Updated: 11.10.2026 15:17

A Denial of Service (DoS) vulnerability exists in the jaraco/zipp library, affecting all versions prior to 3.19.1. The vulnerability is triggered when processing a specially crafted zip file that leads to an infinite loop. This issue also impacts the zipfile module of CPython, as features from the third-party zipp library are later merged into CPython, and the affected code is identical in both projects. The infinite loop can be initiated through the use of functions affecting the Path module in both zipp and zipfile, such as joinpath, the overloaded division operator, and iterdir. Although the infinite loop is not resource exhaustive, it prevents the application from responding. The vulnerability was addressed in version 3.19.1 of jaraco/zipp.

Affected software

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PlatformPackageVulnerable versionsFixed in
Python (PyPI) zipp < 3.19.1 3.19.1

References

CVSS score 6.2/10
CVSS vector
CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE)
CWE-400, CWE-835
Platform
Python (PyPI)
Package
zipp
Disclosed
09.07.2024
Updated
11.10.2026 15:17

Sources and licenses

OSV / GitHub Advisory Database - PYSEC-2026-2074 - PyPA Advisory Database; CC BY 4.0

OSV / GitHub Advisory Database - GHSA-jfmj-5v4g-7637 - CC BY 4.0

Vulnerability history: zipp

All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.

This is the only known vulnerability of this package.

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