High, CVSS 7.5npmAmendedPublished
sigstore's certificateOIDs verification constraints are silently dropped and never enforced
CVE-2026-48815 · GHSA-52v5-jr5w-gjxr
- Affected
- npm sigstore <= 4.1.0
- Fixed in
- 4.1.1· Vendor fix available
- Issue
- 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. Details The public verify options include certificateOIDs and the documentation says those OID/value pairs “must be present in the certificate’s extension list.” The policy-construction path used by sigstore.verify() and createVerifier() only copies the SAN and issuer settings into the verification policy and completely ignores certificateOIDs. As a result, callers can believe they are constraining verification to certificates carrying specific Fulcio or workload-identifying OIDs, while the actual verifier never receives those constraints. Any bundle that satisfies the remaining checks is accepted even if the required OID extensions are absent or mismatched. This is reachable from supported usage through the documented certificateOIDs verify option. PoC Impact Applications that rely on…
Recommended action: Upgrade to 4.1.1 or later, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.