# CVE-2026-126248: Fortinet FortiAuthenticator insufficiently protected credentials

Source: https://junglewise.ai/threats/cve-2026-126248-a-insufficiently-protected-credentials-vulnerability-in-fortinet  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-11. Updated: 2026-11-11  
License: CC BY 4.0 with a link back

CVE-2026-126248 · Severity: high · CVSS 7.5 · Published 2026-11-11

FortiAuthenticator is a multi-factor authentication system used by enterprises to secure user access to critical applications. An unauthenticated attacker can exploit this vulnerability to extract sensitive credentials and authentication data through HTTPS requests, potentially compromising user accounts and bypassing authentication controls.

Technologies: [Fortinet FortiAuthenticator](https://junglewise.ai/threats/technologies/fortiauthenticator). Vendors: [Fortinet](https://junglewise.ai/threats/vendors/fortinet).

## Quick answers

**Is CVE-2026-126248 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-126248 being exploited in the wild.

**How severe is CVE-2026-126248?** High severity, with a CVSS score of 7.5, 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-2026-126248?** 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-2026-126248 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-126248?** 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 insufficiently protected credentials vulnerability (CWE-522) in the FortiAuthenticator API allows unauthenticated attackers to obtain sensitive information via HTTPS requests. The vulnerability affects versions 8.0.0–8.0.3 and 6.6.0–6.6.10. Fixes are 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
- 2026-11-11: advisory

## References

- [https://fortiguard.fortinet.com/psirt/FG-IR-26-262](https://fortiguard.fortinet.com/psirt/FG-IR-26-262)

## Related threats

- [Fortinet FortiAuthenticator hard-coded password authentication bypass](https://junglewise.ai/threats/cve-2026-126257-a-use-of-hard-coded-password-vulnerability-in-fortinet)
- [Fortinet FortiAuthenticator SQL injection](https://junglewise.ai/threats/cve-2026-126252-a-improper-neutralization-of-special-elements-used-in-an-sql)
- [Fortinet FortiAuthenticator incorrect authorization](https://junglewise.ai/threats/cve-2026-126251-a-incorrect-authorization-vulnerability-in-fortinet)
- [Fortinet FortiAuthenticator authorization bypass DoS](https://junglewise.ai/threats/cve-2026-126250-a-incorrect-authorization-vulnerability-in-fortinet)
- [Fortinet FortiAuthenticator privilege escalation in GUI](https://junglewise.ai/threats/cve-2026-126249-a-improper-privilege-management-vulnerability-in-fortinet)