CVE-2026-78376
Full vulnerability record from the local CVENow database.
Description
A flaw was found in WebKitGTK. Processing malicious web content can cause a use-after-free issue due to improper memory handling and result in memory corruption.
Severity
HIGH
CVSS score
8.8
(v3.1)
Vulnerability status
Awaiting Analysis
Source identifier
Published
2026-08-24 14:17:05.390000
Last modified
2026-10-29 20:17:35.803000
View original CVE JSON
{
"id": "CVE-2026-78376",
"sourceIdentifier": "[email protected]",
"published": "2026-08-24T14:17:05.390",
"lastModified": "2026-10-29T20:17:35.803",
"vulnStatus": "Awaiting Analysis",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "A flaw was found in WebKitGTK. Processing malicious web content can cause a use-after-free issue due to improper memory handling and result in memory corruption."
},
{
"lang": "es",
"value": "Se encontró una vulnerabilidad en WebKitGTK. El procesamiento de contenido web malicioso puede causar un problema de uso después de liberación debido a un manejo inadecuado de la memoria y resultar en corrupción de memoria."
}
],
"affected": [
{
"source": "[email protected]",
"affectedData": [
{
"vendor": "WebKit",
"product": "WebKit",
"defaultStatus": "unaffected",
"collectionURL": "https://webkit.org/",
"packageName": "webkit",
"versions": [
{
"version": "2.21.1",
"lessThan": "*",
"versionType": "semver",
"status": "affected"
}
]
},
{
"vendor": "WebKitGTK",
"product": "WebKitGTK",
"defaultStatus": "unaffected",
"collectionURL": "https://webkitgtk.org/",
"packageName": "webkitgtk",
"versions": [
{
"version": "2.21.1",
"lessThan": "*",
"versionType": "semver",
"status": "affected"
}
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 7 Extended Lifecycle Support",
"defaultStatus": "affected",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "webkitgtk4",
"cpes": [
"cpe:/o:redhat:rhel_els:7"
],
"versions": [
{
"version": "0:2.54.0-1.el7_9",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 8",
"defaultStatus": "affected",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "webkit2gtk3",
"cpes": [
"cpe:/a:redhat:enterprise_linux:8::appstream"
],
"versions": [
{
"version": "0:2.54.0-1.el8_10",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support",
"defaultStatus": "affected",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "webkit2gtk3",
"cpes": [
"cpe:/a:redhat:rhel_aus:8.6::appstream",
"cpe:/a:redhat:rhel_eus_long_life:8.6::appstream"
],
"versions": [
{
"version": "0:2.54.0-1.el8_6",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On",
"defaultStatus": "affected",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "webkit2gtk3",
"cpes": [
"cpe:/a:redhat:rhel_aus:8.6::appstream",
"cpe:/a:redhat:rhel_eus_long_life:8.6::appstream"
],
"versions": [
{
"version": "0:2.54.0-1.el8_6",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 9",
"defaultStatus": "affected",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "webkit2gtk3",
"cpes": [
"cpe:/a:redhat:enterprise_linux:9::appstream"
],
"versions": [
{
"version": "0:2.54.0-1.el9_8",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions",
"defaultStatus": "affected",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "webkit2gtk3",
"cpes": [
"cpe:/a:redhat:rhel_e4s:9.2::appstream"
],
"versions": [
{
"version": "0:2.54.0-1.el9_2",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions",
"defaultStatus": "affected",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "webkit2gtk3",
"cpes": [
"cpe:/a:redhat:rhel_e4s:9.4::appstream"
],
"versions": [
{
"version": "0:2.54.0-1.el9_4",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 9.6 Extended Update Support",
"defaultStatus": "affected",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "webkit2gtk3",
"cpes": [
"cpe:/a:redhat:rhel_eus:9.6::appstream"
],
"versions": [
{
"version": "0:2.54.0-1.el9_6",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 6",
"defaultStatus": "unknown",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "webkitgtk",
"cpes": [
"cpe:/o:redhat:enterprise_linux:6"
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 7",
"defaultStatus": "unaffected",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "webkitgtk3",
"cpes": [
"cpe:/o:redhat:enterprise_linux:7"
]
}
]
}
],
"metrics": {
"cvssMetricV31": [
{
"source": "[email protected]",
"type": "Secondary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"baseScore": 8.8,
"baseSeverity": "HIGH",
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"privilegesRequired": "NONE",
"userInteraction": "REQUIRED",
"scope": "UNCHANGED",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"availabilityImpact": "HIGH"
},
"exploitabilityScore": 2.8,
"impactScore": 5.9
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2026-08-24T00:00:00+00:00",
"id": "CVE-2026-78376",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "total"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
]
},
"weaknesses": [
{
"source": "[email protected]",
"type": "Secondary",
"description": [
{
"lang": "en",
"value": "CWE-416"
}
]
}
],
"references": [
{
"url": "https://access.redhat.com/errata/RHSA-2026:69098",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:74084",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:89821",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:89822",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:91631",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:92216",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:92339",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/security/cve/CVE-2026-78376",
"source": "[email protected]"
},
{
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2521858",
"source": "[email protected]"
},
{
"url": "https://github.com/WebKit/WebKit/pull/72142",
"source": "[email protected]"
}
]
}