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Advisory record · GHSA-v653-r55g-hcmg

uv has ZIP payload obfuscation through parsing differentials

CVSS 6.3 MediumEPSS 0.0019 · 8th percentile

Published by the GitHub Advisory Database at 27 Feb 2026, 09:30 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
uvcrates.io<0.9.60.9.6
Identifiers
GHSA-v653-r55g-hcmg · CVE-2025-13327 · GHSA-pqhf-p39g-3x64 · PYSEC-2026-2295
Weakness (CWE)
CWE-1286
Tags
Published
27 Feb 2026
Updated
4 Nov 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

uv versions before 0.9.6 are vulnerable to ZIP payload obfuscation through parsing differentials. An attacker who supplies a specially crafted ZIP archive can get malicious code executed during package resolution or installation, but the victim must install the attacker-controlled package. Upgrade uv to version 0.9.6 or later.

Written 3 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
6.3 Medium 3.1 CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H CNA (redhat)
  • CISA KEV Not listed.
  • EPSS 0.0019, the 8th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 27 Feb 2026, 07:30 UTC Confirmed by the CVE List
  2. 27 Feb 2026, 08:17 UTC Confirmed by NVD
  3. 27 Feb 2026, 09:30 UTC Confirmed by GitHub Advisory Database
  4. 31 Oct 2026, 14:24 UTC First seen by agentprime
  5. 31 Oct 2026, 14:24 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.