VYPR
High severityGHSA Advisory· Published May 6, 2026· Updated May 6, 2026

Auth.js SDK has Improper Permission Checking

CVE-2026-42280

Description

Description

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.

Am

I Affected? Users are affected if they meet each of the following preconditions: - Applications built using Auth0.js version between 8.11.0 and 9.32.0 - The application’s access control relies on rules defined in Auth0 Actions.

### Affected product and versions auth0.js SDK v8.11.0 to v9.32.0

Resolution

Upgrade auth0/auth0.js to v10.0.0 or greater.

Acknowledgements

Okta would like to thank Quan Le (@aleister1102) for their discovery and responsible disclosure.

Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
auth0-jsnpm
>= 8.11.0, < 10.0.010.0.0

Affected products

1

Patches

0

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

2

News mentions

0

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