CVE-2026-47191

CVE-2026-47191 · kas checks out SHA-like git branches as valid commits

Cette page présente des faits issus de sources publiques. Consultez l’avis original avant toute mise à jour.

kas is a setup tool for bitbake based projects. Prior to version 5.3, when relying solely on a git commit ID (SHA-1 or SHA-256) to qualify if a checkout of a repository is equivalent to the state validated while adding its commit ID to a kas configuration, users may be tricked to check out a branch of the same name from this repository. This implies that the referenced repository has been taken over by an attacker and modified to carry such a branch. SHA-1 commits may also be replaced by creating hash collisions, so the primary impact of this issue is on SHA-256 commit IDs. Version 5.3 fixes the issue. As a workaround, avoid relying solely on the commit ID for integrity validation of a repository that might become under control of a malicious 3rd party. If available, additional validate cryptographically signed commits or tags. Alternatively, mirror the repository to a save place, validate its integrity, and use this instead of the original one.

CVSS 2.1 · Faible · EPSS 0,2% · Correctif disponible

Publication

2026-08-14T16:35:48.128Z

Mise à jour

2026-08-18T02:10:29.632Z

Pile logicielle: system · python

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