Intel

AIKIDO-2025-10777

taskcluster is vulnerable to Zip Slip

Zip Slip Pre-CVE
Found by Aikido Intel before public disclosure or CVE publication.
Published Nov 10, 2025

75

High Risk

This Affects:

PYTHONtaskcluster
25.3.0 - 91.1.0
Fixed in 91.1.1
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TL;DR

Affected versions of this package are vulnerable to a zip slip vulnerability in the unzip() function, which allows attackers to write files outside the intended extraction directory by including path traversal sequences (e.g., ../) in archive entries. This issue occurs because file paths from zip entries are not properly validated before extraction. The fix adds path sanitization and validation to ensure that extracted files remain within the designated destination directory, preventing arbitrary file overwrite and potential remote code execution.

Who does this affect?

You are affected if you are using a vulnerable version of taskcluster.

Background info

taskcluster is vulnerable to Zip Slip in versions 25.3.0 - 91.1.0.

How to fix this

Upgrade taskcluster to the patch version.