Vulnerability in Sigstore Sigstore-Js
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 relying on certificateOIDs to restrict which certificates may sign artifacts can accept unauthorized certificates. This issue is fixed in version 4.1.1.
EPSS: 0.002 (8.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
Affected products
- Sigstore Sigstore-js — versions < 4.1.1
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-48815?
- CVE-2026-48815 is a high-severity vulnerability in Sigstore Sigstore-Js, classified under Improper Verification of Cryptographic Signature. CVSS score: 7.5/10. Published 2026-07-14.
- How severe is CVE-2026-48815?
- High severity. CVSS v3 base score is 7.5 out of 10.