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CVE-2026-42280

Improper Permission Checking in Auth.js SDK

Published: May 27, 2026Updated: Jun 4, 2026 Sources: CVE List NVDCWE-863
7.1HIGH
NVD MITRE
EPSS Score
0.2%
Top 88.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:HI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-863

Affected Products

auth0
commercialaka auth0.js, nextjs-auth0, login by auth0
auth0.jsSaaS
Security Products / identity-access-mgmt

Exploitability

Official Patch Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques
Initial Access
View detailed technique mapping

References

https://github.com/auth0/auth0.js/security/advisories/GHSA-8qjv-jj2q-x832
github.com
News mentions
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