FORTIMAIL · CVE-2026-126148 · Infrastructure
FIX → 7.6.7 · 8.0.2 ✓ verified
FortiMail 8.0.0 through 8.0.1 and 7.6.0 through 7.6.6 contain an OS command injection flaw in the high-availability join-request handling. An unauthenticated attacker who sends crafted HA join-request packets can execute unauthorized code or commands on the appliance.
first public Nov 11, 2026 · 2 sources
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Self-managed FortiMail appliances and VMs running 8.0.0-8.0.1 or 7.6.0-7.6.6 are affected: crafted HA join-request packets can let an unauthenticated attacker run commands. Fortinet's advisory does not say HA clustering must be enabled, so do not assume single units are safe. FortiMail 7.4/7.2 and FortiMail Cloud (already patched by Fortinet) can skip it.
Not affected if fortimail-cloud, managed-hosting, unknown
Who cares email-gateway, fortimail, fortinet, self-hosted
get system status)8.0.0-8.0.1 or 7.6.0-7.6.6 (self-managed)A improper neutralization of special elements used in an os command ('os command injection') vulnerability in Fortinet FortiMail 8.0.0 through 8.0.1, FortiMail 7.6.0 through 7.6.6 may allow an unauthenticated attacker to execute unauthorized code or commands via crafted HA join-request packets.
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Upgrade to 7.6.7 · 8.0.2
8.0.2 or above7.6.7 or above