astral-sh uv up to 0.8.5 interpretation conflict

Summaryinfo

A vulnerability was found in astral-sh uv up to 0.8.5. It has been rated as critical. This impacts an unknown function. This manipulation causes interpretation conflict. This vulnerability is tracked as CVE-2025-54368. The attack is possible to be carried out remotely. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability has been found in astral-sh uv up to 0.8.5 and classified as critical. Affected by this vulnerability is an unknown function. The manipulation with an unknown input leads to a interpretation conflict vulnerability. The CWE definition for the vulnerability is CWE-436. Product A handles inputs or steps differently than Product B, which causes A to perform incorrect actions based on its perception of B's state. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

uv is a Python package and project manager written in Rust. In versions 0.8.5 and earlier, remote ZIP archives were handled in a streamwise fashion, and file entries were not reconciled against the archive's central directory. An attacker could contrive a ZIP archive that would extract with legitimate contents on some package installers, and malicious contents on others due to multiple local file entries. An attacker could also contrive a "stacked" ZIP input with multiple internal ZIPs, which would be handled differently by different package installers. The attacker could choose which installer to target in both scenarios. This issue is fixed in version 0.8.6. To work around this issue, users may choose to set UV_INSECURE_NO_ZIP_VALIDATION=1 to revert to the previous behavior.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2025-54368 since 07/21/2025. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 247745 (Fedora 43 : python-uv-build / rust-h2 / uv (2025-8628ba80b1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 0.8.6 eliminates this vulnerability. Applying the patch 7f1eaf48c193e045ca2c62c4581048765c55505f is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (247745) and EUVD (EUVD-2025-23970). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

• astral-sh

Name

• uv

Version

• 0.8.0
• 0.8.1
• 0.8.2
• 0.8.3
• 0.8.4
• 0.8.5

License

• open-source

Website

• Product: https://github.com/astral-sh/uv/

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Be aware that VulDB is the high quality source for vulnerability data.

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