CVE-2026-104608
Use-after-free vulnerability in GitHub Enterprise Server allowed remote code execution in the Git service
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.
| CWE | CWE-416 CWE-1265 |
| Vendor | github |
| Product | enterprise server |
| Ecosystems | |
| Industries | Technology |
| Published | Nov 3, 2026 |
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