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Vulnerability record · CVE-2022-23540 · published 22 December 2022

CVE-2022-23540: Auth0 jsonwebtoken improper authentication vulnerability

Auth0 · Jsonwebtoken

In versions `<=8.5.1` of `jsonwebtoken` library, lack of algorithm definition in the `jwt.verify()` function can lead to signature validation bypass due to defaulting to the `none` algorithm for signature verification. Users are affected if you do not specify algorithms in the `jwt.verify()` function. This issue has been fixed, please update to version 9.0.0 which removes the default support for the none algorithm in the `jwt.verify()` method. There will be no impact, if you update to version 9.0.0 and you don’t need to allow for the `none` algorithm. If you need 'none' algorithm, you have to explicitly specify that in `jwt.verify()` options.

7.6 CVSS 3.1 High EPSS 0.53% · top 57.3% CWE-287 · Improper authenticationCWE-347 · Improper verification of cryptographic signature
7.6CVSS 3.1 base score
0.53%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

Description

In versions `<=8.5.1` of `jsonwebtoken` library, lack of algorithm definition in the `jwt.verify()` function can lead to signature validation bypass due to defaulting to the `none` algorithm for signature verification. Users are affected if you do not specify algorithms in the `jwt.verify()` function. This issue has been fixed, please update to version 9.0.0 which removes the default support for the none algorithm in the `jwt.verify()` method. There will be no impact, if you update to version 9.0.0 and you don’t need to allow for the `none` algorithm. If you need 'none' algorithm, you have to explicitly specify that in `jwt.verify()` options.

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

Affected products

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

References

LinkTags
https://github.com/auth0/node-jsonwebtoken/commit/e1fa9dcc12054a8681db4e6373da1b30cf7016e3 Patch
https://github.com/auth0/node-jsonwebtoken/security/advisories/GHSA-qwph-4952-7xr6 Third Party Advisory
https://security.netapp.com/advisory/ntap-20240621-0007/
https://github.com/auth0/node-jsonwebtoken/commit/e1fa9dcc12054a8681db4e6373da1b30cf7016e3 Patch
https://github.com/auth0/node-jsonwebtoken/security/advisories/GHSA-qwph-4952-7xr6 Third Party Advisory
https://security.netapp.com/advisory/ntap-20240621-0007/

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Source: NIST National Vulnerability Database (record CVE-2022-23540), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.