7.1

CVE-2026-42280: auth0 auth0.js Incorrect Authorization

CVSS: 7.1v3.1HighAnalyzed
AliasesGHSA-8qjv-jj2q-x832
Published 27-05-2026Last modified 28-05-2026
Open JSON

Vulnerability summary

CVE-2026-42280 is a high (CVSS 7.1) Incorrect Authorization vulnerability in auth0 auth0.js. EPSS estimates a 0.29% chance of exploitation in the next 30 days, higher than 20.2% of scored vulnerabilities.

Overall risk
28/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.1/10
010
High · v3.1 (CVE.org)
EPSS score
0.29%
0%100%
Low · +0.08 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 27-05-2026
    PublishedVulnerability first disclosed.
  2. 28-05-2026
    Last modifiedVulnerability information updated.

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 metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.29%

Chance of exploitation in the next 30 days

Percentile

20%

Versus all other CVEs

30-day change

+0.08 pp

From 0.21% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.29%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Auth01 product
  • auth0.js≥ 8.11.0, ≤ 9.32.0 | ≥ 8.11.0, < 10.0.0
Npm1 product
  • auth0-js≥ 8.11.0, < 10.0.0

2 vendors · 2 products

References

3 links