Is CVE-2026-107371 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-107371 being exploited in the wild.

How severe is CVE-2026-107371?

Medium severity, with a CVSS score of 5.4, published 13 October 2026.

Which products and versions are affected?

Auth0.Js 9.12.0 through 10.2.1.

Is there a fix for CVE-2026-107371?

Yes: fixed in 10.3.0 or greater. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-107371 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-107371?

Check whether you run Auth0.Js at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-107371: auth0.js missing auth_time claim validation

CVE-2026-107371 · Severity: medium · CVSS 5.4 · Published 2026-10-13

The auth0.js library, which handles authentication and authorization for web applications, fails to validate the age of user authentication sessions. When an application requests a fresh login (maxAge parameter), the library may accept an older authentication token, allowing users to bypass freshness requirements and potentially access sensitive resources that should require re-authentication.

Vendors: Auth0.

Quick answers

Is CVE-2026-107371 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-107371 being exploited in the wild.
How severe is CVE-2026-107371?: Medium severity, with a CVSS score of 5.4, published 13 October 2026.
Which products and versions are affected?: Auth0.Js 9.12.0 through 10.2.1.
Is there a fix for CVE-2026-107371?: Yes: fixed in 10.3.0 or greater. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-107371 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-107371?: Check whether you run Auth0.Js at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

Fixed in: 10.3.0 or greater

Technical details

The authorize() method does not validate the auth_time claim in ID tokens against the requested maxAge parameter, allowing authentication events older than the maximum age to be accepted. This is a missing claim validation issue (CWE-613) that requires the application to explicitly pass a maxAge value and the user's existing authentication to exceed that threshold. An attacker with the ability to reuse old session credentials can bypass freshness checks.

Affected products

Auth0 auth0.js 9.12.0 through 10.2.1

Timeline

2026-10-13: disclosed

References

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.