A buffer overflow was addressed with improved bounds checking. This issue is fixed in iOS 26.6 and iPadOS 26.6, macOS Sequoia 15.7.8, macOS Tahoe 26.6. Processing a maliciously crafted file may lead to unexpected app termination or arbitrary code execution.
PUBLISHED5.2
Problem type
- Processing a maliciously crafted file may lead to unexpected app termination or arbitrary code execution
Affected products
Apple
iOS and iPadOS
< 26.6 - AFFECTED
macOS
< 15.7.8 - AFFECTED
< 26.6 - AFFECTED
References
support.apple.com
https://support.apple.com/en-us/128066
support.apple.com
https://support.apple.com/en-us/128067
support.apple.com
https://support.apple.com/en-us/128071
GitHub Security Advisories
GHSA-77wc-7xcr-f383
A buffer overflow was addressed with improved bounds checking. This issue is fixed in iOS 26.6...
https://github.com/advisories/GHSA-77wc-7xcr-f383A buffer overflow was addressed with improved bounds checking. This issue is fixed in iOS 26.6 and iPadOS 26.6, macOS Sequoia 15.7.8, macOS Tahoe 26.6. Processing a maliciously crafted file may lead to unexpected app termination or arbitrary code execution.
JSON source
https://cveawg.mitre.org/api/cve/CVE-2026-43776Click to expand
{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-43776",
"assignerOrgId": "286789f9-fbc2-4510-9f9a-43facdede74c",
"assignerShortName": "apple",
"dateUpdated": "2026-07-28T03:57:19.188Z",
"dateReserved": "2026-05-01T22:46:27.818Z",
"datePublished": "2026-07-27T20:14:34.942Z",
"state": "PUBLISHED"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "286789f9-fbc2-4510-9f9a-43facdede74c",
"shortName": "apple",
"dateUpdated": "2026-07-27T20:14:34.942Z"
},
"descriptions": [
{
"lang": "en",
"value": "A buffer overflow was addressed with improved bounds checking. This issue is fixed in iOS 26.6 and iPadOS 26.6, macOS Sequoia 15.7.8, macOS Tahoe 26.6. Processing a maliciously crafted file may lead to unexpected app termination or arbitrary code execution."
}
],
"affected": [
{
"vendor": "Apple",
"product": "iOS and iPadOS",
"versions": [
{
"version": "0",
"status": "affected",
"versionType": "custom",
"lessThan": "26.6"
}
]
},
{
"vendor": "Apple",
"product": "macOS",
"versions": [
{
"version": "0",
"status": "affected",
"versionType": "custom",
"lessThan": "15.7.8"
},
{
"version": "0",
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"versionType": "custom",
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"problemTypes": [
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"descriptions": [
{
"lang": "en",
"description": "Processing a maliciously crafted file may lead to unexpected app termination or arbitrary code execution"
}
]
}
],
"references": [
{
"url": "https://support.apple.com/en-us/128066"
},
{
"url": "https://support.apple.com/en-us/128067"
},
{
"url": "https://support.apple.com/en-us/128071"
}
]
},
"adp": [
{
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-07-28T03:57:19.188Z"
},
"title": "CISA ADP Vulnrichment",
"problemTypes": [
{
"descriptions": [
{
"lang": "en",
"description": "CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')",
"cweId": "CWE-120",
"type": "CWE"
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"attackVector": "LOCAL",
"attackComplexity": "LOW",
"privilegesRequired": "NONE",
"userInteraction": "REQUIRED",
"scope": "UNCHANGED",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH"
}
},
{}
]
}
]
}
}