Disclosure 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 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.
Source-reported weakness categories
CWE-918
Source-specific records & product guidance
Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.
NIST National Vulnerability Database · NVD-CVE-2026-96890
Open original source · Updated Oct 09, 2026
Only CPE matches marked vulnerable=true are indexed. AND/OR platform conditions must be checked in the original NVD record.
| Vendor | Product / association | Version / bounds |
|---|---|---|
| github | enterprise_server | * {"versionStartIncluding":"3.22.0","versionEndExcluding":"3.22.2"} |
Original records & references
- NIST NVD record
- CVE Program record
- docs.github.com — Release Notes, Vendor Advisory
- docs.github.com — Release Notes, Vendor Advisory
- docs.github.com — Release Notes, Vendor Advisory
PUBLISHED 2026-10-06T15:18:17-04:00
MODIFIED 2026-10-09T10:04:56-04:00
INGESTED 2026-10-10T20:50:46-04:00