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Vulnerability record · CVE-2026-42280 · published 27 May 2026

CVE-2026-42280: Auth0.js incorrect authorization vulnerability

Auth0 · Auth0.Js

Auth0.js is a client-side JavaScript library for Auth0. From 8.11.0 to 9.32.0, under specific preconditions, the Auth0.js SDK may improperly return user profile information using a valid access token when a specifically crafted invalid ID token is provided. This vulnerability is fixed in 10.0.0.

7.1 CVSS 3.1 High EPSS 0.29% · top 80.7% CWE-863 · Incorrect authorization
7.1CVSS 3.1 base score
0.29%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References
17 Jun 2026Last modified by NVD

Description

Auth0.js is a client-side JavaScript library for Auth0. From 8.11.0 to 9.32.0, under specific preconditions, the Auth0.js SDK may improperly return user profile information using a valid access token when a specifically crafted invalid ID token is provided. This vulnerability is fixed in 10.0.0.

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

Affected products

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

References

LinkTags
https://github.com/auth0/auth0.js/security/advisories/GHSA-8qjv-jj2q-x832 Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2018-6873Auth0.js improper authentication vulnerabilityThe Auth0 authentication service before 2017-10-15 allows privilege escalation because the JWT audience is not validated.EPSS 2.2%8.8CVE-2018-6874Auth0.js cross-site request forgery vulnerabilityCSRF exists in the Auth0 authentication service through 14591 if the Legacy Lock API flag is enabled.EPSS 0.74%8.8CVE-2018-7307Auth0.js cross-site request forgery vulnerabilityThe Auth0 Auth0.js library before 9.3 has CSRF because it mishandles the case where the authorization response lacks the state parameter.EPSS 0.51%7.7CVE-2020-15125Auth0.js error message information leak vulnerabilityIn auth0 (npm package) versions before 2.27.1, a DenyList of specific keys that should be sanitized from the request object contained in the error ob…EPSS 1.5%7.5CVE-2017-17068Auth0.js information exposure vulnerabilityA cross-origin vulnerability has been discovered in the Auth0 auth0.js library affecting versions < 8.12. This vulnerability allows an attacker to ac…EPSS 1.4%4.9CVE-2020-5263Auth0.js insufficiently protected credentials vulnerabilityauth0.js (NPM package auth0-js) greater than version 8.0.0 and before version 9.12.3 has a vulnerability. In the case of an (authentication) error, t…EPSS 0.87%9.1CVE-2026-71362Adobe commerce incorrect authorization vulnerabilityAdobe Commerce is affected by an Incorrect Authorization vulnerability that could result in privilege escalation. An attacker could leverage this vul…KEVEPSS 88%8.8CVE-2026-42016JFrog Artifactory token scope bypass enables privilege escalationJFrog Artifactory (Self Hosted) before 7.133.11 validates a token's signature and issuer but not its scope, so a token can be used for actions beyond…KEVEPSS 8.6%analysed

Source: NIST National Vulnerability Database (record CVE-2026-42280), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.