CVE-2026-39811
Full vulnerability record from the local CVENow database.
Description
A integer overflow or wraparound vulnerability in Fortinet FortiWeb 8.0.0 through 8.0.3, FortiWeb 7.6.0 through 7.6.6, FortiWeb 7.4 all versions, FortiWeb 7.2 all versions, FortiWeb 7.0 all versions may allow attacker to denial of service via <insert attack vector here>
Severity
MEDIUM
CVSS score
4.9
(v3.1)
Vulnerability status
Analyzed
Source identifier
Published
2026-04-14 16:16:45.310000
Last modified
2026-10-26 21:10:00.170000
View original CVE JSON
{
"id": "CVE-2026-39811",
"sourceIdentifier": "[email protected]",
"published": "2026-04-14T16:16:45.310",
"lastModified": "2026-10-26T21:10:00.170",
"vulnStatus": "Analyzed",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "A integer overflow or wraparound vulnerability in Fortinet FortiWeb 8.0.0 through 8.0.3, FortiWeb 7.6.0 through 7.6.6, FortiWeb 7.4 all versions, FortiWeb 7.2 all versions, FortiWeb 7.0 all versions may allow attacker to denial of service via <insert attack vector here>"
},
{
"lang": "es",
"value": "Una vulnerabilidad de desbordamiento de entero o desbordamiento cíclico en Fortinet FortiWeb 8.0.0 hasta 8.0.3, FortiWeb 7.6.0 hasta 7.6.6, FortiWeb 7.4 todas las versiones, FortiWeb 7.2 todas las versiones, FortiWeb 7.0 todas las versiones puede permitir al atacante realizar una denegación de servicio a través de <insertar vector de ataque aquí>"
}
],
"affected": [
{
"source": "[email protected]",
"affectedData": [
{
"vendor": "Fortinet",
"product": "FortiWeb",
"defaultStatus": "unaffected",
"cpes": [
"cpe:2.3:a:fortinet:fortiweb:8.0.3:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortiweb:8.0.2:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortiweb:8.0.1:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortiweb:8.0.0:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortiweb:7.6.6:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortiweb:7.6.5:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortiweb:7.6.4:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortiweb:7.6.3:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortiweb:7.6.2:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortiweb:7.6.1:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortiweb:7.6.0:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortiweb:7.4.12:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortiweb:7.4.11:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortiweb:7.4.10:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortiweb:7.4.9:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortiweb:7.4.8:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortiweb:7.4.7:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortiweb:7.4.6:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortiweb:7.4.5:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortiweb:7.4.4:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortiweb:7.4.3:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortiweb:7.4.2:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortiweb:7.4.1:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortiweb:7.4.0:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortiweb:7.2.12:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortiweb:7.2.11:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortiweb:7.2.10:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortiweb:7.2.9:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortiweb:7.2.8:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortiweb:7.2.7:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortiweb:7.2.6:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortiweb:7.2.5:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortiweb:7.2.4:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortiweb:7.2.3:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortiweb:7.2.2:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortiweb:7.2.1:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortiweb:7.2.0:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortiweb:7.0.12:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortiweb:7.0.11:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortiweb:7.0.10:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortiweb:7.0.9:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortiweb:7.0.8:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortiweb:7.0.7:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortiweb:7.0.6:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortiweb:7.0.5:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortiweb:7.0.4:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortiweb:7.0.3:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortiweb:7.0.2:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortiweb:7.0.1:*:*:*:*:*:*:*",
"cpe:2.3:a:fortinet:fortiweb:7.0.0:*:*:*:*:*:*:*"
],
"versions": [
{
"version": "8.0.0",
"lessThanOrEqual": "8.0.3",
"versionType": "semver",
"status": "affected"
},
{
"version": "7.6.0",
"lessThanOrEqual": "7.6.6",
"versionType": "semver",
"status": "affected"
},
{
"version": "7.4.0",
"lessThanOrEqual": "7.4.12",
"versionType": "semver",
"status": "affected"
},
{
"version": "7.2.0",
"lessThanOrEqual": "7.2.12",
"versionType": "semver",
"status": "affected"
},
{
"version": "7.0.0",
"lessThanOrEqual": "7.0.12",
"versionType": "semver",
"status": "affected"
}
]
}
]
}
],
"metrics": {
"cvssMetricV31": [
{
"source": "[email protected]",
"type": "Secondary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H",
"baseScore": 4.9,
"baseSeverity": "MEDIUM",
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"privilegesRequired": "HIGH",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"availabilityImpact": "HIGH"
},
"exploitabilityScore": 1.2,
"impactScore": 3.6
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2026-04-14T16:25:41.160205Z",
"id": "CVE-2026-39811",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
]
},
"weaknesses": [
{
"source": "[email protected]",
"type": "Secondary",
"description": [
{
"lang": "en",
"value": "CWE-190"
}
]
}
],
"configurations": [
{
"nodes": [
{
"operator": "OR",
"negate": false,
"cpeMatch": [
{
"vulnerable": true,
"criteria": "cpe:2.3:a:fortinet:fortiweb:*:*:*:*:*:*:*:*",
"versionStartIncluding": "7.0.0",
"versionEndIncluding": "7.0.13",
"matchCriteriaId": "1616A048-AEA1-4340-B208-9DECD688C5E0"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:a:fortinet:fortiweb:*:*:*:*:*:*:*:*",
"versionStartIncluding": "7.2.0",
"versionEndIncluding": "7.2.13",
"matchCriteriaId": "DCAF1C24-6077-4396-A5C8-90C96C795D6A"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:a:fortinet:fortiweb:*:*:*:*:*:*:*:*",
"versionStartIncluding": "7.4.0",
"versionEndIncluding": "7.4.12",
"matchCriteriaId": "C68859A1-DA8E-4363-A174-0D53BD0B5625"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:a:fortinet:fortiweb:*:*:*:*:*:*:*:*",
"versionStartIncluding": "7.6.0",
"versionEndExcluding": "7.6.7",
"matchCriteriaId": "15C9CDE3-FE6F-4946-A3DC-FDD7A5F99D65"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:a:fortinet:fortiweb:*:*:*:*:*:*:*:*",
"versionStartIncluding": "8.0.0",
"versionEndExcluding": "8.0.4",
"matchCriteriaId": "9C922491-BA4C-48DF-8697-8FE742FDA39B"
}
]
}
]
}
],
"references": [
{
"url": "https://fortiguard.fortinet.com/psirt/FG-IR-26-108",
"source": "[email protected]",
"tags": [
"Vendor Advisory"
]
}
]
}