CVE-2026-42280 — HIGH (7.1)

Q: How severe is CVE-2026-42280?

CVE-2026-42280 has been rated HIGH with a CVSS base score of 7.1/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2026-42280?

Check the references section above for vendor advisories and patch information. Affected products include: Auth0 Auth0.Js.

Vulnerability 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 Score

7.1

HIGH

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

HIGH

Integrity

LOW

Availability

NONE

Affected Products

Vendor	Product	Versions
Auth0	Auth0.Js	>= 8.11.0, < 10.0.0

Related Weaknesses (CWE)

CWE-863

References

https://github.com/auth0/auth0.js/security/advisories/GHSA-8qjv-jj2q-x832Vendor Advisory

FAQ

What is CVE-2026-42280?

CVE-2026-42280 is a vulnerability with a CVSS score of 7.1 (HIGH). 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 ...

How severe is CVE-2026-42280?

CVE-2026-42280 has been rated HIGH with a CVSS base score of 7.1/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-42280?

Check the references section above for vendor advisories and patch information. Affected products include: Auth0 Auth0.Js.