# uv has differential in tar extraction with PAX headers

Source: https://junglewise.ai/threats/uv-has-differential-in-tar-extraction-with-pax-headers-ceaff42a  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-10-21  
License: CC BY 4.0 with a link back

Severity: info · Published 2025-10-21

uv has differential in tar extraction with PAX headers

Technologies: [uv (PyPI)](https://junglewise.ai/threats/technologies/uv). Vendors: [PyPI](https://junglewise.ai/threats/vendors/pypi).

## Quick answers

**Is This vulnerability exploited in the wild?** No. Junglewise Threat Intelligence has no report of This vulnerability being exploited in the wild.

**How severe is This vulnerability?** Informational severity, published 21 October 2025.

**Which products and versions are affected?** uv (PyPI) ECOSYSTEM:introduced=0,fixed=0.9.5.

**Is there a fix for This vulnerability?** Yes. uv (PyPI): upgrade to 0.9.5 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected?** Check whether you run 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 (PyPI): upgrade to 0.9.5 or later

  ```sh
  pip install "uv>=0.9.5"
  ```


## Affected products

- uv (PyPI) ECOSYSTEM:introduced=0,fixed=0.9.5

## Related threats

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- [Astral uv compromised emSign CA root certificate](https://junglewise.ai/threats/pysec-2026-4321-uv-s-bundled-ca-store-trusts-an-emsign-root-whose-aeefabb5)
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- [uv path traversal in wheel extraction on Windows](https://junglewise.ai/threats/cve-2026-104843-uv-is-a-python-package-and-project-manager-written-in-rust-from)
- [PYSEC-2026-2001 - uv allows ZIP payload obfuscation through parsing differentials](https://junglewise.ai/threats/cve-2025-54368-uv-allows-zip-payload-obfuscation-through-parsing-differentials)