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Vulnerability record · CVE-2025-65945 · published 4 December 2025

CVE-2025-65945: Auth0 node-jws improper verification of cryptographic signature vulnerability

Auth0 · Node Jws

auth0/node-jws is a JSON Web Signature implementation for Node.js. In versions 3.2.2 and earlier and version 4.0.0, auth0/node-jws has an improper signature verification vulnerability when using the HS256 algorithm under specific conditions. Applications are affected when they use the jws.createVerify() function for HMAC algorithms and use user-provided data from the JSON Web Signature protected header or payload in HMAC secret lookup routines, which can allow attackers to bypass signature verification. This issue has been patched in versions 3.2.3 and 4.0.1.

7.5 CVSS 3.1 High EPSS 0.22% · top 89.3% CWE-347 · Improper verification of cryptographic signature
7.5CVSS 3.1 base score
0.22%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
24 Jul 2026Last modified by NVD

Description

auth0/node-jws is a JSON Web Signature implementation for Node.js. In versions 3.2.2 and earlier and version 4.0.0, auth0/node-jws has an improper signature verification vulnerability when using the HS256 algorithm under specific conditions. Applications are affected when they use the jws.createVerify() function for HMAC algorithms and use user-provided data from the JSON Web Signature protected header or payload in HMAC secret lookup routines, which can allow attackers to bypass signature verification. This issue has been patched in versions 3.2.3 and 4.0.1.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/auth0/node-jws/commit/34c45b2c04434f925b638de6a061de9339c0ea2e Patch
https://github.com/auth0/node-jws/security/advisories/GHSA-869p-cjfg-cm3x Vendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2025-65945), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.