GitHub Enterprise Server · Path Traversal Vulnerability Was Identified
Source GCVE Database
Not known to be exploited · CVSS 8.6 High · fixed in 3.22.3 : patch Enterprise Server soon.
Data as of 4 Nov 2026, 01:43 UTC
Thin evidence
One scorer or none| CNA (GitHub_P) | CVSS 4.0 | 8.6 |
|---|
- Patch
- Available – fixed in 3.22.3, 3.21.8, 3.20.10 +1
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:NExploitation evidence
Disclosed: evidence found.
CVE published 17 Jul 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 3 Nov 2026.
What to do
Upgrade Enterprise Server to 3.22.3, 3.21.8, 3.20.10 or 3.19.14.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| GitHubEnterprise Server | Affected
| Fixed in
|
Description
A path traversal vulnerability was identified in GitHub Enterprise Server that allowed an attacker who had code execution inside the Dependabot updater container to write files to arbitrary repository paths, including GitHub Actions workflow files under .github/workflows/ as the path validation did not check the effective path which the attacker could control through the dependency file's directory and symlink target. If the repository used a pull_request_target workflow or had auto-merge enabled, an injected workflow could execute with access to the repository's GitHub Actions secrets. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.22 and was fixed in versions 3.21.3, 3.20.5, 3.19.9, 3.18.12, 3.17.18.
References
- nvd.nist.gov/vuln/detail/CVE-2026-15343 (opens in a new tab)
- docs.github.com/en/enterprise-server@3.17/admin/release-notes (opens in a new tab)
- docs.github.com/en/enterprise-server@3.18/admin/release-notes (opens in a new tab)
- docs.github.com/en/enterprise-server@3.19/admin/release-notes (opens in a new tab)
- docs.github.com/en/enterprise-server@3.19/admin/release-notes (opens in a new tab)
- docs.github.com/en/enterprise-server@3.20/admin/release-notes (opens in a new tab)
- docs.github.com/en/enterprise-server@3.20/admin/release-notes (opens in a new tab)
- docs.github.com/en/enterprise-server@3.21/admin/release-notes (opens in a new tab)
- docs.github.com/en/enterprise-server@3.21/admin/release-notes (opens in a new tab)
- docs.github.com/en/enterprise-server@3.22/admin/release-notes (opens in a new tab)