CVE-2026-42280

FAUCET Score

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.

First published: May 27, 2026Last modified: May 27, 2026

Impacted Technologies

Vendor	Product	Version(s)	CPE
		>= 8.11.0, < 10.0.0CPE matchmatch criteria	cpe:2.3:a:auth0:auth0.js::::::node.js::*

CVSS Data

CVSS version used by this source: 3.1

7.1HIGH

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

LOW

Availability Impact

NONE

Exploitability Score

2.8

Impact Score

4.2

CvssVersion

3.1

Exploit Intelligence

EPSS Score

0.21%

Probability of exploitation in next 30 days

EPSS Percentile

11.5%

Percentile rank of EPSS score among Peer Group

As of 2026-07-26

Model: v2026.06.15

This CVE's current EPSS score of 0.0021 is in the 1st percentile among its peer group of 17,823 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

npmpatch availablevia ghsa

Product: auth0-jsFixed in: 10.0.0

github_advisoryvendor investigatingvia nvd_reference

View patch

Vendor Advisories (1)

npmGHSA-8qjv-jj2q-x832high

Auth.js SDK has Improper Permission Checking

May 6, 2026

References

github.com / auth0/auth0.js/security/advisories/GHSA-8qjv-jj2q-x832

Vendor Advisory