CVE-2026-13046 – A deserialization of untrusted data vulnerability in WatchGuard Fireware OS’s SAML single

A deserialization of untrusted data vulnerability in WatchGuard Fireware OS’s SAML single sign-on session handling (samld) allows an attacker who has already obtained the ability to write files on the appliance to execute arbitrary code in the context of the samld service by causing samld to load a maliciously crafted session file.