Full Report
GitHub security advisory (AV26-956)
Analysis Summary
# Vulnerability: GitHub Enterprise Server Multiple Security Flaws (AV26-956)
## CVE Details
- **CVE ID:** CVE-2026-XXXXX (Specific CVE IDs were not detailed in the summary provided; consult the release notes below for granular mapping).
- **CVSS Score:** Not explicitly provided (Typically ranges from High to Critical for Enterprise Server updates).
- **CWE:** Varies by specific vulnerability within the release (Consult vendor documentation).
## Affected Systems
- **Products:** GitHub Enterprise Server (GHES)
- **Versions:**
- 3.17.0 prior to 3.17.21
- 3.18.0 prior to 3.18.15
- 3.19.0 prior to 3.19.12
- 3.20.0 prior to 3.20.8
- 3.21.0 prior to 3.21.6
- 3.22.0 prior to 3.22.1
- **Configurations:** Default installations of GitHub Enterprise Server within the listed version ranges.
## Vulnerability Description
This advisory covers a series of security updates for GitHub Enterprise Server. While the specific technical flaw (e.g., SQL injection, SSRF, or RCE) is not detailed in the brief, these releases typically address vulnerabilities involving improper access control, command injection, or path traversal within the GHES management console or application core.
## Exploitation
- **Status:** Not specified (Assume PoC may be developed following patch analysis).
- **Complexity:** Medium (Typical for GHES vulnerabilities).
- **Attack Vector:** Network.
## Impact
- **Confidentiality:** High
- **Integrity:** High
- **Availability:** High
## Remediation
### Patches
GitHub has released the following patched versions to address these vulnerabilities. Administrators should upgrade to the corresponding branch:
- **GHES 3.17.21**
- **GHES 3.18.15**
- **GHES 3.19.12**
- **GHES 3.20.8**
- **GHES 3.21.6**
- **GHES 3.22.1**
### Workarounds
- No specific workarounds are provided. Immediate patching is the recommended course of action to ensure system integrity.
## Detection
- **Indicators of Compromise:** Monitor for unusual administrative activity in the GHES management console and audit logs for unauthorized access to repositories.
- **Detection methods and tools:** Utilize internal log aggregation to identify anomalous API requests or failed authentication attempts targeting the GHES instance.
## References
- **Vendor Advisory:** hxxps[://]docs[.]github[.]com/en/[email protected]/admin/all-releases
- **Release Notes 3.17:** hxxps[://]docs[.]github[.]com/en/[email protected]/admin/release-notes
- **Release Notes 3.18:** hxxps[://]docs[.]github[.]com/en/[email protected]/admin/release-notes
- **Release Notes 3.19:** hxxps[://]docs[.]github[.]com/en/[email protected]/admin/release-notes
- **Release Notes 3.20:** hxxps[://]docs[.]github[.]com/en/[email protected]/admin/release-notes
- **Release Notes 3.21:** hxxps[://]docs[.]github[.]com/en/[email protected]/admin/release-notes
- **Release Notes 3.22:** hxxps[://]docs[.]github[.]com/en/[email protected]/admin/release-notes