Full Report
GitHub security advisory (AV26-230)
Analysis Summary
# Vulnerability: GitHub Enterprise Server Multiple Security Flaws (AV26-230)
## CVE Details
- **CVE ID:** CVE-2026-XXXXX (Specific CVEs not listed in the advisory summary, but associated with the GHES March 2026 release cycle)
- **CVSS Score:** N/A (Severity categorized as Important/Critical by vendor)
- **CWE:** Not specified in source document
## Affected Systems
- **Products:** GitHub Enterprise Server (GHES)
- **Versions:**
- 3.19.x prior to 3.19.3
- 3.18.x prior to 3.18.6
- 3.17.x prior to 3.17.12
- 3.16.x prior to 3.16.15
- 3.15.x prior to 3.15.19
- 3.14.x prior to 3.14.24
- **Configurations:** Standard self-hosted GHES deployments.
## Vulnerability Description
While the specific nature of the flaws is contained within individual release notes, these security advisories typically address vulnerabilities in the GitHub Enterprise Server management console, API authentication headers, or underlying containerized services. The updates address vulnerabilities that could potentially lead to unauthorized access or information disclosure within the enterprise environment.
## Exploitation
- **Status:** Not reported as exploited in the wild at the time of publication.
- **Complexity:** Low to Medium (Typical for GHES security updates).
- **Attack Vector:** Network (Typically requires network access to the GHES instance).
## Impact
- **Confidentiality:** High
- **Integrity:** High
- **Availability:** High
*(Based on standard GitHub Enterprise critical patch profiles)*
## Remediation
### Patches
The Canadian Centre for Cyber Security recommends upgrading to the following versions:
- GitHub Enterprise Server 3.19.3
- GitHub Enterprise Server 3.18.6
- GitHub Enterprise Server 3.17.12
- GitHub Enterprise Server 3.16.15
- GitHub Enterprise Server 3.15.19
- GitHub Enterprise Server 3.14.24
### Workarounds
No specific workarounds provided; immediate patching is the recommended mitigation strategy.
## Detection
- **Indicators of Compromise:** Monitor management console logs for unauthorized administrative attempts.
- **Detection methods and tools:** Audit internal GHES logs for suspicious API requests or unexpected configuration changes.
## References
- hxxps[://]www[.]cyber[.]gc[.]ca/en/alerts-advisories/github-security-advisory-av26-230
- hxxps[://]docs[.]github[.]com/en/[email protected]/admin/release-notes
- hxxps[://]docs[.]github[.]com/en/[email protected]/admin/release-notes
- hxxps[://]docs[.]github[.]com/en/[email protected]/admin/release-notes
- hxxps[://]docs[.]github[.]com/en/[email protected]/admin/release-notes
- hxxps[://]docs[.]github[.]com/en/[email protected]/admin/release-notes
- hxxps[://]docs[.]github[.]com/en/[email protected]/admin/release-notes