Quick answers
- Is CVE-2026-126158 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-126158 being exploited in the wild.
- How severe is CVE-2026-126158?
- High severity, with a CVSS score of 7.2, published 11 November 2026.
- Which products and versions are affected?
- Fortinet FortiMail 8.0.0 through 8.0.1.
- Is there a fix for CVE-2026-126158?
- Yes: fixed in FortiMail 8.0.2 and above. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-126158 attacked?
- It is in a network appliance.
- Am I affected by CVE-2026-126158?
- 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 and above
Technical details
An OS command injection vulnerability (CWE-78) exists in the FortiMail HTTP API that fails to properly sanitize special shell characters in user-supplied input. An authenticated administrator can craft malicious HTTP requests to inject shell commands that execute as root. The vulnerability affects versions 8.0.0 and 8.0.1; versions 7.4 and 7.6 are not affected.
Affected products
- Fortinet FortiMail 8.0.0 through 8.0.1
Timeline
- 2026-11-10: advisory
- 2026-11-11: disclosed