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Vulnerability record · CVE-2026-48815 · published 14 July 2026

CVE-2026-48815: Improper verification of cryptographic signature vulnerability

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.

7.5 CVSS 3.1 High EPSS 0.19% · top 92.3% CWE-347 · Improper verification of cryptographic signature Deferred
7.5CVSS 3.1 base score
0.19%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
5References
15 Jul 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

References

LinkTags
https://github.com/sigstore/sigstore-js/commit/7845532f9d17f6f765363dbee82b01bd159fb52b
https://github.com/sigstore/sigstore-js/pull/1658
https://github.com/sigstore/sigstore-js/releases/tag/sigstore%404.1.1
https://github.com/sigstore/sigstore-js/security/advisories/GHSA-52v5-jr5w-gjxr
https://github.com/sigstore/sigstore-js/security/advisories/GHSA-52v5-jr5w-gjxr

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Source: NIST National Vulnerability Database (record CVE-2026-48815), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.