CVE-2026-43656
Full vulnerability record from the local CVENow database.
Description
An out-of-bounds write issue was addressed with improved input validation. This issue is fixed in iOS 18.7.9 and iPadOS 18.7.9, iOS 26.5 and iPadOS 26.5, macOS Sequoia 15.7.7, macOS Sonoma 14.8.7, macOS Tahoe 26.5. Parsing a maliciously crafted file may lead to an unexpected app termination.
Severity
HIGH
CVSS score
7.3
(v3.1)
Vulnerability status
Analyzed
Source identifier
Published
2026-05-11 21:19:01.380000
Last modified
2026-10-26 18:10:00.173000
View original CVE JSON
{
"id": "CVE-2026-43656",
"sourceIdentifier": "[email protected]",
"published": "2026-05-11T21:19:01.380",
"lastModified": "2026-10-26T18:10:00.173",
"vulnStatus": "Analyzed",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "An out-of-bounds write issue was addressed with improved input validation. This issue is fixed in iOS 18.7.9 and iPadOS 18.7.9, iOS 26.5 and iPadOS 26.5, macOS Sequoia 15.7.7, macOS Sonoma 14.8.7, macOS Tahoe 26.5. Parsing a maliciously crafted file may lead to an unexpected app termination."
},
{
"lang": "es",
"value": "Se abordó un problema de escritura fuera de límites con una validación de entrada mejorada. Este problema se solucionó en iOS 18.7.9 y iPadOS 18.7.9, iOS 26.5 y iPadOS 26.5, macOS Sequoia 15.7.7, macOS Sonoma 14.8.7, macOS Tahoe 26.5. Analizar un archivo creado con fines maliciosos puede provocar una terminación inesperada de la aplicación."
}
],
"affected": [
{
"source": "[email protected]",
"affectedData": [
{
"vendor": "Apple",
"product": "iOS and iPadOS",
"versions": [
{
"version": "0",
"lessThan": "18.7.9",
"versionType": "custom",
"status": "affected"
},
{
"version": "0",
"lessThan": "26.5",
"versionType": "custom",
"status": "affected"
}
]
},
{
"vendor": "Apple",
"product": "macOS",
"versions": [
{
"version": "0",
"lessThan": "14.8.7",
"versionType": "custom",
"status": "affected"
},
{
"version": "0",
"lessThan": "15.7.7",
"versionType": "custom",
"status": "affected"
},
{
"version": "0",
"lessThan": "26.5",
"versionType": "custom",
"status": "affected"
}
]
}
]
}
],
"metrics": {
"cvssMetricV31": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
"baseScore": 7.3,
"baseSeverity": "HIGH",
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"privilegesRequired": "NONE",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"availabilityImpact": "LOW"
},
"exploitabilityScore": 3.9,
"impactScore": 3.4
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2026-05-12T17:21:45.698535Z",
"id": "CVE-2026-43656",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
]
},
"weaknesses": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary",
"description": [
{
"lang": "en",
"value": "CWE-787"
}
]
}
],
"configurations": [
{
"nodes": [
{
"operator": "OR",
"negate": false,
"cpeMatch": [
{
"vulnerable": true,
"criteria": "cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*",
"versionEndExcluding": "18.7.9",
"matchCriteriaId": "F3968B76-E6DE-416D-A0FB-E4833FFAAE0F"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*",
"versionStartIncluding": "26.0",
"versionEndExcluding": "26.5",
"matchCriteriaId": "20644D7E-2AB6-48CA-AED4-C474A9867986"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*",
"versionEndExcluding": "18.7.9",
"matchCriteriaId": "B6431EAF-B395-4C19-9AB6-A2F45991C897"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*",
"versionStartIncluding": "26.0",
"versionEndExcluding": "26.5",
"matchCriteriaId": "1BE54A3B-D667-43BA-AB71-BCF8438054E0"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*",
"versionStartIncluding": "14.0",
"versionEndExcluding": "14.8.7",
"matchCriteriaId": "DD9E7FAE-30DA-4B2B-A63A-6DFEA7A29933"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*",
"versionStartIncluding": "15.0",
"versionEndExcluding": "15.7.7",
"matchCriteriaId": "2984C440-3DC2-413A-B5FA-1FAB21078DB8"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*",
"versionStartIncluding": "26.0",
"versionEndExcluding": "26.5",
"matchCriteriaId": "6CB91417-90A8-4A9B-A1D0-1D94B80EF837"
}
]
}
]
}
],
"references": [
{
"url": "https://support.apple.com/en-us/127110",
"source": "[email protected]",
"tags": [
"Release Notes",
"Vendor Advisory"
]
},
{
"url": "https://support.apple.com/en-us/127111",
"source": "[email protected]",
"tags": [
"Release Notes",
"Vendor Advisory"
]
},
{
"url": "https://support.apple.com/en-us/127115",
"source": "[email protected]",
"tags": [
"Release Notes",
"Vendor Advisory"
]
},
{
"url": "https://support.apple.com/en-us/127116",
"source": "[email protected]",
"tags": [
"Release Notes",
"Vendor Advisory"
]
},
{
"url": "https://support.apple.com/en-us/127117",
"source": "[email protected]",
"tags": [
"Release Notes",
"Vendor Advisory"
]
}
]
}