CVE-2026-104608
Severity not reportedA remote code execution vulnerability was identified in GitHub Enterprise Server in the Git service (babeld).
A remote code execution vulnerability was identified in GitHub Enterprise Server in the Git service (babeld). babeld held references into internal collections while calling into the SSH library, where a re-entrant callback could modify a collection and invalidate those references. An attacker with an account and SSH access to the instance could leverage this use-after-free into a controlled write and run arbitrary commands as babeld, including disclosure of its environment secrets. Exploitation required per-build memory offsets; failed attempts crashed babeld. This affected all releases prior to 3.23 and was fixed in 3.22.3, 3.21.8, 3.20.10, and 3.19.14. This vulnerability was reported via the GitHub Bug Bounty program.
Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://docs.github.com/en/enterprise-server@3.19/admin/release-notes#3.19.14 product-cna@github.com
- https://docs.github.com/en/enterprise-server@3.20/admin/release-notes#3.20.10 product-cna@github.com
- https://docs.github.com/en/enterprise-server@3.21/admin/release-notes#3.21.8 product-cna@github.com
- https://docs.github.com/en/enterprise-server@3.22/admin/release-notes#3.22.3 product-cna@github.com