CVE-2025-13327: uv has ZIP payload obfuscation through parsing differentials

CVE-2025-13327 · Severity: medium · CVSS 6.3 · Published 2026-02-27

A flaw was found in uv. This vulnerability allows an attacker to execute malicious code during package resolution or installation via specially crafted ZIP (Zipped Information Package) archives that exploit parsing differentials, requiring user interaction to install an attacker-controlled package.

Technologies: Astral Uv, uv (PyPI). Vendors: Astral, crates.io, PyPI.

Quick answers

Is CVE-2025-13327 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2025-13327 being exploited in the wild.
How severe is CVE-2025-13327?
Medium severity, with a CVSS score of 6.3, published 27 February 2026.
Which products and versions are affected?
uv (crates.io) < 0.9.6, SEMVER:introduced=0,fixed=0.9.6; uv (PyPI) ECOSYSTEM:introduced=0,fixed=0.9.6.
Is there a fix for CVE-2025-13327?
Yes. uv (crates.io): upgrade to 0.9.6 or later; uv (PyPI): upgrade to 0.9.6 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2025-13327?
Check whether you run Astral Uv, uv (crates.io) or uv (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • uv (crates.io): upgrade to 0.9.6 or later
    cargo update -p uv
  • uv (PyPI): upgrade to 0.9.6 or later
    pip install "uv>=0.9.6"

Affected products

  • Astral Uv
  • uv (crates.io) < 0.9.6, SEMVER:introduced=0,fixed=0.9.6
  • uv (PyPI) ECOSYSTEM:introduced=0,fixed=0.9.6

Identifiers

  • CVE-2025-13327
  • GHSA-pqhf-p39g-3x64
  • GHSA-v653-r55g-hcmg
  • PYSEC-2026-2295

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