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High severityNVD Advisory· Published Dec 4, 2025· Updated Dec 5, 2025

auth0/node-jws improper HMAC signature verification vulnerability

CVE-2025-65945

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.

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Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
jwsnpm
< 3.2.33.2.3
jwsnpm
>= 4.0.0, < 4.0.14.0.1

Affected products

83

Patches

Vulnerability mechanics

References

7

News mentions

0

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