8.8

CVE-2026-76851

Server-Side Request Forgery vulnerability in GitHub Enterprise Server allowed remote code execution via network access from pre-receive hooks to internal services

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Github ≫ Enterprise Server Version < 3.17.20
Github ≫ Enterprise Server Version >= 3.18.0 < 3.18.14
Github ≫ Enterprise Server Version >= 3.19.0 < 3.19.11
Github ≫ Enterprise Server Version >= 3.20.0 < 3.20.7
Github ≫ Enterprise Server Version >= 3.21.0 < 3.21.5
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.44% 0.37
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
NIST 8.8 2.8 5.9
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
product-cna@github.com 7.7 0 0
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CWE-918 Server-Side Request Forgery (SSRF)

The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.

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