Files
vuln-cve/data/2026/84xxx/CVE-2026-84120.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-84120",
"assignerOrgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
"state": "PUBLISHED",
"assignerShortName": "mozilla",
"dateReserved": "2026-09-01T07:25:08.573Z",
"datePublished": "2026-09-01T12:18:40.455Z",
"dateUpdated": "2026-09-01T21:44:08.380Z"
},
"containers": {
"cna": {
"affected": [
{
"product": "Firefox",
"vendor": "Mozilla",
"versions": [
{
"status": "unaffected",
"version": "115.40",
"lessThanOrEqual": "115.*",
"versionType": "rpm"
},
{
"status": "unaffected",
"version": "140.15",
"lessThanOrEqual": "140.*",
"versionType": "rpm"
},
{
"status": "unaffected",
"version": "153.2",
"lessThanOrEqual": "153.*",
"versionType": "rpm"
},
{
"status": "unaffected",
"version": "155",
"lessThanOrEqual": "*",
"versionType": "rpm"
}
]
},
{
"product": "Thunderbird",
"vendor": "Mozilla",
"versions": [
{
"status": "unaffected",
"version": "140.15",
"lessThanOrEqual": "140.*",
"versionType": "rpm"
},
{
"status": "unaffected",
"version": "153.2",
"lessThanOrEqual": "153.*",
"versionType": "rpm"
},
{
"status": "unaffected",
"version": "155",
"lessThanOrEqual": "*",
"versionType": "rpm"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Use-after-free in the Audio/Video component. This vulnerability was fixed in Firefox 155, Firefox ESR 115.40, Firefox ESR 140.15, Firefox ESR 153.2, Thunderbird 155, Thunderbird 140.15, and Thunderbird 153.2.",
"supportingMedia": [
{
"type": "text/html",
"base64": false,
"value": "Use-after-free in the Audio/Video component. This vulnerability was fixed in Firefox 155, Firefox ESR 115.40, Firefox ESR 140.15, Firefox ESR 153.2, Thunderbird 155, Thunderbird 140.15, and Thunderbird 153.2."
}
]
}
],
"title": "Use-after-free in the Audio/Video component",
"references": [
{
"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=2058911"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-82/"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-83/"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-84/"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-85/"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-86/"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-87/"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-88/"
}
],
"credits": [
{
"lang": "en",
"value": "Ukyo Akai"
}
],
"providerMetadata": {
"orgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
"shortName": "mozilla",
"dateUpdated": "2026-09-01T21:44:08.380Z"
}
},
"adp": [
{
"problemTypes": [
{
"descriptions": [
{
"type": "CWE",
"cweId": "CWE-416",
"lang": "en",
"description": "CWE-416 Use After Free"
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 5.4,
"attackVector": "NETWORK",
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N",
"integrityImpact": "LOW",
"userInteraction": "REQUIRED",
"attackComplexity": "LOW",
"availabilityImpact": "NONE",
"privilegesRequired": "NONE",
"confidentialityImpact": "LOW"
}
},
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-09-01T13:47:00.121971Z",
"id": "CVE-2026-84120",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-09-01T13:47:04.126Z"
}
}
]
}
}