---
cve: "CVE-2026-76851"
severity: "LOW"
cvss: 3.1
epss: "2.5%"
vendor: "Generic Security"
kev: false
exploited: false
published: "2026-09-01 22:17:13"
tags: [cve, security, low]
source: tsecurity.de CVE-Dossier
exported: "2026-09-03T01:58:39+02:00"
---

# CVE-2026-76851

> 3.1 LOW

## Beschreibung

A Server-Side Request Forgery (SSRF) vulnerability was identified in GitHub Enterprise Server that allowed remote code execution on the instance. Insufficient network isolation allowed malicious pre-receive hook code to impersonate an internal service and redirect trusted internal requests to a privileged service, leading to elevated code execution. Exploitation required pre-receive hook networking to be enabled and either site administrator privileges or write access to a repository containing a configured pre-receive hook. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.22 and was fixed in versions 3.17.20, 3.18.14, 3.19.11, 3.20.7, and 3.21.5. This vulnerability was reported via the GitHub Bug Bounty program.

## Referenzen

- <https://docs.github.com/en/enterprise-server@3.17/admin/release-notes#3.17.20>
- <https://docs.github.com/en/enterprise-server@3.18/admin/release-notes#3.18.14>
- <https://docs.github.com/en/enterprise-server@3.19/admin/release-notes#3.19.11>
- <https://docs.github.com/en/enterprise-server@3.20/admin/release-notes#3.20.7>
- <https://docs.github.com/en/enterprise-server@3.21/admin/release-notes#3.21.5>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-76851) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_