---
id: CVE-2026-96890
title: >-
  A Server-Side Request Forgery (SSRF) vulnerability was identified in GitHub
  Enterprise Server that allowed a repository contributor to cause the appliance
  to issue requests to attacker-controlled internal hosts, which could be
  chained to…
summary: >-
  A Server-Side Request Forgery (SSRF) vulnerability was identified in GitHub
  Enterprise Server that allowed a repository contributor to cause the appliance
  to issue requests to attacker-controlled internal hosts, which could be
  chained to…
severity: high
cvss: 8.7
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'
cwe:
  - CWE-918
vendor: GitHub
product: Enterprise Server
affected:
  - enterprise_server >= 3.20.0 < 3.20.*
  - enterprise_server >= 3.21.0 < 3.21.*
  - enterprise_server >= 3.22.0 < 3.22.*
published: '2026-10-06'
updated: '2026-10-06'
sourceUpdated: '2026-10-06T20:03:40.690'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-96890'
references:
  - url: >-
      https://docs.github.com/en/enterprise-server@3.20/admin/release-notes#3.20.9
    label: product-cna@github.com
  - url: >-
      https://docs.github.com/en/enterprise-server@3.21/admin/release-notes#3.21.7
    label: product-cna@github.com
  - url: >-
      https://docs.github.com/en/enterprise-server@3.22/admin/release-notes#3.22.2
    label: product-cna@github.com
tags:
  - nvd
  - cve.org
cvssSource: cna
ingestedAt: '2026-10-06T19:13:33.849Z'
---

## Overview

A Server-Side Request Forgery (SSRF) vulnerability was identified in GitHub Enterprise Server that allowed a repository contributor to cause the appliance to issue requests to attacker-controlled internal hosts, which could be chained to achieve remote code execution on the appliance. The secret scanning validator for GCP service account credentials trusted the token endpoint embedded in a committed credential and issued a request to it without restricting the destination. Exploitation required an authenticated user with permission to push to a repository on an instance with GitHub Advanced Security and secret scanning validity checks enabled, a non-default configuration. This vulnerability affected GitHub Enterprise Server 3.20, 3.21, and 3.22 and was fixed in versions 3.20.9, 3.21.7, and 3.22.2. This vulnerability was reported through the GitHub Bug Bounty program.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.