GitHub fixes RCE that exposed millions of private repos
🛡️ GitHub patched a critical remote code execution bug, CVE-2026-3854, reported by Wiz on March 4, 2026, that could have allowed attackers to access millions of private repositories. The company reproduced the issue within 40 minutes and deployed a fix to GitHub.com in under two hours. The flaw affected GitHub.com and multiple Enterprise offerings and could be triggered by a single crafted git push that injects unsafe metadata fields. GitHub’s forensic review found no evidence of exploitation prior to the researcher disclosure, and patches for GitHub Enterprise Server releases are available now; administrators are urged to upgrade immediately.
