CVE-2026-48815: Sigstore Sigstore-Js

High severity, CVSS 7.5. EPSS: 0.2% chance of exploitation in the next 30 days.

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 relying on certificateOIDs to restrict which certificates may sign artifacts can accept unauthorized certificates. This issue is fixed in version 4.1.1.

Affected products

• Sigstore Sigstore-Js: before 4.1.1 (fixed in 4.1.1)

Published 2026-07-14. Last modified 2026-07-15.