GitHub Patches Critical Flaws in Enterprise Server Update

GitHub released urgent security updates for GitHub Enterprise Server (v3.16–3.20) to address multiple high-severity issues: a pre-auth SSRF in an upload endpoint that can reach internal services, kernel networking vulnerabilities (Dirty Frag) enabling local privilege escalation to root, and a timing side-channel allowing extraction of sensitive environment variables from package lookup features; administrators must rotate the revoked release signing key, remove or patch the vulnerable package endpoint, and apply updates immediately to mitigate information disclosure and potential host compromise.