Is CVE-2026-126238 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-126238 being exploited in the wild.

How severe is CVE-2026-126238?

High severity, with a CVSS score of 8.6, published 11 November 2026.

Which products and versions are affected?

Fortinet FortiAuthenticator 8.0.0 through 8.0.3, 6.6.0 through 6.6.10.

Is there a fix for CVE-2026-126238?

Yes: fixed in FortiAuthenticator 8.0.4 or above, 6.6.11 or above. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-126238 attacked?

It is attacked over the network, in a network appliance.

Am I affected by CVE-2026-126238?

Check whether you run Fortinet FortiAuthenticator 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-2026-126238: Fortinet FortiAuthenticator incorrect authorization in REST API

CVE-2026-126238 · Severity: high · CVSS 8.6 · Published 2026-11-11

FortiAuthenticator is an authentication and authorization platform used to secure access to corporate networks and applications. An unauthenticated attacker can bypass authorization checks in the REST API to gain unauthorized access to restricted administrative functionality, potentially leading to account compromise or system misconfiguration.

Technologies: Fortinet FortiAuthenticator. Vendors: Fortinet.

Quick answers

Is CVE-2026-126238 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-126238 being exploited in the wild.
How severe is CVE-2026-126238?: High severity, with a CVSS score of 8.6, published 11 November 2026.
Which products and versions are affected?: Fortinet FortiAuthenticator 8.0.0 through 8.0.3, 6.6.0 through 6.6.10.
Is there a fix for CVE-2026-126238?: Yes: fixed in FortiAuthenticator 8.0.4 or above, 6.6.11 or above. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-126238 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-126238?: Check whether you run Fortinet FortiAuthenticator 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: FortiAuthenticator 8.0.4 or above, 6.6.11 or above

Technical details

An incorrect authorization vulnerability (CWE-863) in the REST API of FortiAuthenticator allows unauthenticated attackers to bypass authorization checks. The attack requires no authentication, credentials, or user interaction and grants access to restricted functionality. A fix is available in FortiAuthenticator 8.0.4 and 6.6.11.

Affected products

Fortinet FortiAuthenticator 8.0.0 through 8.0.3, 6.6.0 through 6.6.10

Timeline

2026-11-10: disclosed: Fortinet PSIRT publication

References

https://fortiguard.fortinet.com/psirt/FG-IR-26-253

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