CVE-2026-15343

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.

CVSS

No CVSS.

References

Link	Resource
https://docs.github.com/en/enterprise-server@3.17/admin/release-notes#3.17.18
https://docs.github.com/en/enterprise-server@3.18/admin/release-notes#3.18.12
https://docs.github.com/en/enterprise-server@3.19/admin/release-notes#3.19.9
https://docs.github.com/en/enterprise-server@3.20/admin/release-notes#3.20.5
https://docs.github.com/en/enterprise-server@3.21/admin/release-notes#3.21.3

Configurations

No configuration.

History

17 Jul 2026, 16:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-07-17 16:17

Updated : 2026-07-17 18:11

NVD link : CVE-2026-15343

Mitre link : CVE-2026-15343

CVE.ORG link : CVE-2026-15343

JSON object : View

Products Affected

No product.

CWE

CWE-22

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

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