{"id":"CVE-2026-47191","aliases":["GHSA-qjwp-hrq6-r26r","PYSEC-2026-2544"],"url":"https://o3.security/vulnerability/CVE-2026-47191","summary":"kas checks out SHA-like git branches as valid commits","details":"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.","published":"2026-08-14T16:35:48.128Z","modified":"2026-08-19T03:31:18.786894469Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"PyPI","name":"kas","fixedVersion":"5.3"}],"fix":{"url":"https://github.com/siemens/kas/commit/4cb4a3d01122ffaec9feaae768a5814092f6f9b5","label":"siemens/kas@4cb4a3d"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/47xxx/CVE-2026-47191.json"},{"type":"ADVISORY","url":"https://github.com/pypa/advisory-database/tree/main/vulns/kas/PYSEC-2026-2544.yaml"},{"type":"ADVISORY","url":"https://github.com/siemens/kas/security/advisories/GHSA-qjwp-hrq6-r26r"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-47191"},{"type":"FIX","url":"https://github.com/siemens/kas/commit/4cb4a3d01122ffaec9feaae768a5814092f6f9b5"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-19T03:31:18.786894469Z"}}