CVE-2026-104608
HIGH
MEDIUM
Priority: 0.03
BB Relevance:
65/100
Published: 2026-11-03
Modified: 2026-11-06
First seen: 2026-11-03
Status: active
Attack Surface
Network
Low Complexity
No Interaction
Conf. Impact
Integ. Impact
CVSS Vector Breakdown
AV:
Network
AC:
High
PR:
Low
UI:
None
AT:
None
VC:
High
VI:
High
VA:
High
Description
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.
Weakness Classification (2)
Affected Software (8)
| Vendor | Product | Version |
|---|---|---|
| GitHub | Enterprise Server | 3.19.0 < 3.19.* |
| GitHub | Enterprise Server | 3.20.0 < 3.20.* |
| GitHub | Enterprise Server | 3.21.0 < 3.21.* |
| GitHub | Enterprise Server | 3.22.0 < 3.22.* |
| GitHub | Enterprise Server | 3.19.0 < 3.19.* |
| GitHub | Enterprise Server | 3.20.0 < 3.20.* |
| GitHub | Enterprise Server | 3.21.0 < 3.21.* |
| GitHub | Enterprise Server | 3.22.0 < 3.22.* |
References & Advisories (4)
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