CVE-2026-48758

sigstore-js provides JavaScript libraries for interacting with Sigstore services. Prior to 3.2.1, the preAuthEncoding function in @sigstore/core uses Node.js ascii encoding when converting the PAE string to bytes, allowing payloadType to be mutated after signing without invalidating the signature...

CVE-2026-48815

sigstore-js provides JavaScript libraries for interacting with Sigstore services. Prior to 4.1.1, the documented certificateOIDs option in sigstore.verify is accepted by the public API but discarded before verification, so required certificate extension OIDs are never checked and applications...

CVE-2026-48816 sigstore-js: Insufficient Verification of Data Authenticity

sigstore-js provides JavaScript libraries for interacting with Sigstore services. Prior to 3.1.1, @sigstore/verify derives a transparency-log timestamp from tlogEntries.integratedTime for bundle v0.2 inclusionProof-only entries even though the inclusion proof path does not cryptographically bind...

CVE-2026-48816

creationtimestamp| type| source ---|---|--- 2026-07-01 20:35:05+00:00| published-proof-of-concept| https://github.com/sigstore/sigstore-js/security/advisories/GHSA-xgjw-pm74-86q4...

GHSA-XGJW-PM74-86Q4 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...