GHSA-MM27-MWQ9-FR5G GitHub CLI allows attestation verification bypass through unescaped regex metacharacters

Summary A security vulnerability has been identified in GitHub CLI that could allow attestation verification bypass when using gh attestation verify with --signer-repo or --signer-workflow flags. GitHub CLI builds the certificate matcher from these flag values without escaping regex metacharacter...

GitHub CLI allows attestation verification bypass through unescaped regex metacharacters

Summary A security vulnerability has been identified in GitHub CLI that could allow attestation verification bypass when using gh attestation verify with --signer-repo or --signer-workflow flags. GitHub CLI builds the certificate matcher from these flag values without escaping regex metacharacter...

CVE-2026-64655

GitHub CLI gh is GitHub’s official command line tool. Prior to 2.97.0, gh attestation verify builds the certificate Subject Alternative Name matcher from the --signer-repo and --signer-workflow flag values without escaping regex metacharacters, so a user-supplied repository or workflow name is...

CVE-2026-64655

GitHub CLI (gh) prior to v2.97.0 builds the certificate Subject Alternative Name matcher from --signer-repo and --signer-workflow values without escaping regex metacharacters, causing user-supplied names to be treated as regular expressions. Because characters like '.' can appear in repository/wo...

CVE-2026-64655 GitHub CLI: Attestation Verification Bypass via Unescaped Regex Metacharacters in SAN Matching

GitHub CLI gh is GitHub’s official command line tool. Prior to 2.97.0, gh attestation verify builds the certificate Subject Alternative Name matcher from the --signer-repo and --signer-workflow flag values without escaping regex metacharacters, so a user-supplied repository or workflow name is...