CyberRota Analysis
AI-GeneratedThe GitHub CLI (gh) versions prior to 2.97.0 are vulnerable due to improper handling of user-supplied repository and workflow names in the attestation verification process, allowing attackers to exploit regex metacharacters. This could enable an attacker to bypass Sigstore attestation verification by creating a lookalike repository, potentially compromising supply chain integrity in CI/CD pipelines. Organizations using GitHub CLI for CI/CD processes should prioritize updating to version 2.97.0 to mitigate this risk.
Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
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Original NVD Description
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 treated as a regular expression rather than a literal string. Because GitHub permits characters such as `.` in organization, repository, and workflow path names and `.` is a regex wildcard, an attacker can register a lookalike name (for example github/artifact.attestations-workflows) that satisfies a matcher intended for a different trusted signer (github/artifact-attestations-workflows), bypassing the intended Sigstore attestation verification. Exploitation requires the attacker to create a plausible lookalike repository and produce valid attestations from it, which could undermine supply chain verification for CI/CD pipelines or policy gates that pin trust to a specific signing workflow. This issue is fixed in version 2.97.0.