# CVE-2026-118237: Out-of-bounds read vulnerability in GitHub Enterprise Server allowed disclosure of process memory in the Git service

> CVE-2026-118237: Out-of-bounds read vulnerability in GitHub Enterprise Server allowed disclosure of process memory in the Git service. CVSS 5.3 (CVSS 4.0).

Canonical: https://rewindex.com/cve/CVE-2026-118237
Last updated: 2026-11-06T19:17:38Z

- Published: 2026-11-03 22:51 UTC · Updated: 2026-11-06 19:17 UTC · Assigner: GitHub\_P
- CVSS: 5.3 (CVSS 4.0) · Severity: Medium
- EPSS: 0.27%, 19th percentile (scored 2026-11-10)
- CISA KEV: no
- CWE: CWE-125

## Description

An out-of-bounds read vulnerability was identified in GitHub Enterprise Server in the Git service (babeld). When proving possession of a host key, babeld's SSH implementation sized the session identifier by the current digest length rather than its own. An attacker with an account and SSH access could re-key to an algorithm with a longer hash, causing adjacent process memory to be signed and returned to the client, where a limited amount of it may be recoverable. This vulnerability affected all releases prior to 3.23 and was fixed in versions 3.22.3, 3.21.8, 3.20.10, and 3.19.14. This vulnerability was reported via the GitHub Bug Bounty program.

## Affected vendors and products

- GitHub: Enterprise Server

## Tracked companies

- [GitHub](https://rewindex.com/company/github.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-118237)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-118237)
- [https://docs.github.com/en/enterprise-server@3.19/admin/release-notes\#3.19.14](https://docs.github.com/en/enterprise-server@3.19/admin/release-notes#3.19.14)
- [https://docs.github.com/en/enterprise-server@3.20/admin/release-notes\#3.20.10](https://docs.github.com/en/enterprise-server@3.20/admin/release-notes#3.20.10)
- [https://docs.github.com/en/enterprise-server@3.21/admin/release-notes\#3.21.8](https://docs.github.com/en/enterprise-server@3.21/admin/release-notes#3.21.8)
- [https://docs.github.com/en/enterprise-server@3.22/admin/release-notes\#3.22.3](https://docs.github.com/en/enterprise-server@3.22/admin/release-notes#3.22.3)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-118237 · Markdown: https://rewindex.com/cve/CVE-2026-118237.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-118237 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-11-11T04:59:26.553Z