sigstore-js has Insufficient Verification of Data Authenticity

sigstore-js derives a transparency-log timestamp from tlogEntries.integratedTime and uses it to validate certificate validity windows and satisfy timestampThreshold. For bundle v0.2, a tlog entry can be inclusionProof-only no signed inclusionPromise/set, and the inclusion proof path does not...

PT-2026-55205

Name of the Vulnerable Software and Affected Versions sigstore-js versions prior to 3.1.1 Description The @sigstore/verify library incorrectly derives a transparency-log timestamp from the tlogEntries.integratedTime variable for bundle v0.2 inclusionProof-only entries. Because the inclusion proof...