{"affected":[{"defaultStatus":"unaffected","product":"FortiAuthenticator","source":"CNA: fortinet","vendor":"Fortinet","versions":[{"lessThanOrEqual":"8.0.3","status":"affected","version":"8.0.0","versionType":"semver"},{"lessThanOrEqual":"6.6.10","status":"affected","version":"6.6.0","versionType":"semver"}]}],"cveId":"CVE-2026-126239","cwes":["CWE-121"],"description":"A stack-based buffer overflow vulnerability in Fortinet FortiAuthenticator 8.0.0 through 8.0.3, FortiAuthenticator 6.6.0 through 6.6.10 may allow an unauthenticated attacker to crash the FSSO subsystem via crafted http requests","epss":null,"exploits":[],"kev":null,"metrics":[{"score":7.5,"severity":"high","source":"CNA: fortinet","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C","version":"3.1"}],"modifiedAt":1794432695102,"publishedAt":1794432695102,"references":[{"source":"CNA: fortinet","tags":[],"url":"https://fortiguard.fortinet.com/psirt/FG-IR-26-254"}],"remediation":[{"kind":"fix","source":"CNA: fortinet","text":"Upgrade to FortiAuthenticator version 8.0.4 or above\nUpgrade to FortiAuthenticator version 6.6.11 or above"}],"revision":"2540bca7b27f98447090be0a41cbb84350f13791400df16ec618e63a4e584f1d","sources":[{"modifiedAt":1794432695102,"name":"CNA: fortinet","retrievedAt":1794435010268,"url":"https://www.cve.org/CVERecord?id=CVE-2026-126239"}],"ssvc":null,"status":"published","title":"CVE-2026-126239","updatedAt":1794435010268}