PT-2026-60782 · Github · Enterprise Server

CVE-2026-15343 · Published 2026-07-17 · Updated 2026-07-17

Mitre

CVSS v4.0

8.6

High

Base vector

AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

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.

Fix

Path traversal

Weakness Enumeration

CWE-22

Related Identifiers

CVE-2026-15343

Affected Products

Enterprise Server

References · 6

• https://nvd.nist.gov/vuln/detail/CVE-2026-15343 · Security Note
• https://docs.github.com/en/enterprise-server@3.18/admin/release-notes#3.18.12 · Note
• https://docs.github.com/en/enterprise-server@3.17/admin/release-notes#3.17.18 · Note
• https://docs.github.com/en/enterprise-server@3.19/admin/release-notes#3.19.9 · Note
• https://docs.github.com/en/enterprise-server@3.20/admin/release-notes#3.20.5 · Note
• https://docs.github.com/en/enterprise-server@3.21/admin/release-notes#3.21.3 · Note