CVE-2026-5845 Improper authorization fallback allows scoped user-to-server token installation escape in GitHub Enterprise Server

An improper authorization vulnerability in scoped user-to-server ghu token authorization in GitHub Enterprise Server allows an authenticated attacker to access private repositories outside the intended installation scope, which can include write operations, via an authorization fallback that...

CVE-2026-5845

Summary: CVE-2026-5845 affects GitHub Enterprise Server versions prior to 3.21, due to an improper authorization fallback in scoped user-to-server (ghu_) token handling. An authenticated attacker could access private repositories outside the intended installation scope, potentially including writ...

PT-2026-34212

Name of the Vulnerable Software and Affected Versions GitHub Enterprise Server versions prior to 3.21 Description An improper authorization issue exists in scoped user-to-server ghu token authorization. An authenticated attacker can access private repositories outside the intended installation...