CVE-2026-17556

A path traversal vulnerability was identified in GitHub Enterprise Server that allowed an unauthenticated attacker to delete arbitrary files and directories on the instance, including the entire user storage directory containing Git LFS objects, release assets, attachments, and avatars. The...

CVE-2026-17556

CVE-2026-17556 is a path traversal vulnerability in GitHub Enterprise Server (all versions prior to 3.22). The X-GitHub-Request-Id request header was used without sanitization as a filesystem path segment for the upload buffer directory. An unauthenticated attacker with only network reachability ...