CVE-2026-42280 json
Improper Permission Checking in Auth.js SDK
published 2026-05-06 6 mo ago modified 2026-10-26 14 d ago also EUVD-2026-32533 , GHSA-8qjv-jj2q-x832
- cvss
- 7.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 11%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- npm auth0-js 10.0.0
- auth0 auth0.js 10.0.0
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 5 mo ago
Exploit prediction
0.21% chance of exploitation in the next 30 days, higher than 11% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N |
| GitHub | 3.1 | 7.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | auth0-js | >=8.11.0, <10.0.0 |
10.0.0 |
Affected products
- auth0 auth0.js
Classification
- Weakness
-
- CWE-863 Incorrect Authorization
References
-
github.com
/auth0/auth0.js/security/advisories/GHSA-8qjv-jj2q-x832
web, vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-42280
advisory
-
github.com
/auth0/auth0.js
package
Sources
- CVE List CVE-2026-42280
- GitHub Advisory GHSA-8qjv-jj2q-x832
- NVD CVE-2026-42280
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.