# CVE-2026-126152: Fortinet FortiMail authorization bypass in user-controlled key

Source: https://junglewise.ai/threats/cve-2026-126152-a-authorization-bypass-through-user-controlled-key-vulnerability  
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-2026-126152 · Severity: high · CVSS 7.6 · Published 2026-11-11

FortiMail is an email security and management platform used by organizations to protect and manage email communications. An authenticated attacker can exploit a flaw in access controls to delete arbitrary directories, access or delete other users' calendar and mailbox data across different tenant domains, and potentially gain root-level file system access through crafted requests to the webmail and admin interfaces.

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

## Quick answers

**Is CVE-2026-126152 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-126152 being exploited in the wild.

**How severe is CVE-2026-126152?** High severity, with a CVSS score of 7.6, published 11 November 2026.

**Which products and versions are affected?** Fortinet FortiMail 8.0.0 through 8.0.1, 7.6.0 through 7.6.6, 7.4.0 through 7.4.8, 7.2 all versions.

**Is there a fix for CVE-2026-126152?** Yes: fixed in FortiMail 8.0.2 or above, 7.6.7 or above, 7.4.9 or above; FortiMail 7.2 and 7.0 require migration to fixed release. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-126152 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-126152?** Check whether you run Fortinet FortiMail 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 FortiMail 8.0.2 or above, 7.6.7 or above, 7.4.9 or above; FortiMail 7.2 and 7.0 require migration to fixed release

## Technical details

An authorization bypass vulnerability via user-controlled key (CWE-639) in the FortiMail API and web interfaces allows an authenticated remote attacker to circumvent access controls. By sending crafted HTTP requests, attackers can delete arbitrary directories as root or access and delete other users' calendar and mailbox data across tenant boundaries. The vulnerability affects multiple versions across the 8.0, 7.6, 7.4, and 7.2 release lines.

## Affected products

- Fortinet FortiMail 8.0.0 through 8.0.1, 7.6.0 through 7.6.6, 7.4.0 through 7.4.8, 7.2 all versions

## Timeline

- 2026-11-10: disclosed

## References

- [https://fortiguard.fortinet.com/psirt/FG-IR-26-204](https://fortiguard.fortinet.com/psirt/FG-IR-26-204)

## Related threats

- [Fortinet FortiMail SQL injection](https://junglewise.ai/threats/cve-2026-126263-a-improper-neutralization-of-special-elements-used-in-an-sql)
- [Fortinet FortiMail argument injection in administrative interface](https://junglewise.ai/threats/cve-2026-126169-a-improper-neutralization-of-argument-delimiters-in-a-command)
- [Fortinet FortiMail argument injection in administrative interface](https://junglewise.ai/threats/cve-2026-126168-a-improper-neutralization-of-argument-delimiters-in-a-command)
- [Fortinet FortiMail command injection in admin GUI](https://junglewise.ai/threats/cve-2026-126167-a-improper-neutralization-of-special-elements-used-in-a-command)
- [Fortinet FortiMail argument injection in admin interface](https://junglewise.ai/threats/cve-2026-126166-a-improper-neutralization-of-argument-delimiters-in-a-command)