Memory safety bugs fixed in Firefox ESR 140.11 and Firefox 151_CVE-2026-8974

{
    "lastseen": "",
    "description": "Memory safety bugs present in Firefox ESR 140.10 and Firefox 150. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.",
    "published": "2026-05-19T12:30:23.092Z",
    "modified": "2026-05-19T15:13:46.587Z",
    "type": "cve",
    "title": "Memory safety bugs fixed in Firefox ESR 140.11 and Firefox 151",
    "source": "mozilla",
    "references": "https://bugzilla.mozilla.org/buglist.cgi?bug_id=1784128%2C1883230%2C1983677%2C2022390%2C2023116%2C2023657%2C2024255%2C2024418%2C2024441%2C2024447%2C2024966%2C2025412%2C2025467%2C2025940%2C2025950%2C2025956%2C2026284%2C2027247%2C2027255%2C2027288%2C2027306%2C2027322%2C2027332%2C2027333%2C2028266%2C2028292%2C2028319%2C2028526%2C2028870%2C2028876%2C2028882%2C2029062%2C2029309%2C2029414%2C2029422%2C2029428%2C2029447%2C2029732%2C2029785%2C2029793%2C2029813%2C2029899%2C2031028%2C2031457%2C2032039%2C2033610%2C2033854%2C2034498%2C2034628%2C2034978%2C2035966%2C2036668%2C2036905%2C2036930\nhttps://www.mozilla.org/security/advisories/mfsa2026-46/\nhttps://www.mozilla.org/security/advisories/mfsa2026-48/",
    "id": "CVE-2026-8974",
    "bulletinFamily": "",
    "cwe": [
        "CWE-119"
    ],
    "cvelist": null,
    "sourceData": "",
    "sourceHref": "",
    "cvss": {
        "score": 9.8,
        "severity": "CRITICAL",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Firefox",
    "version": "140.11",
    "vendor": "Mozilla",
    "ai_description": "Memory safety bugs in Firefox ESR 140.10 and Firefox 150 could be exploited to run arbitrary code",
    "ai_severity": "Critical",
    "ai_vendor": "Mozilla",
    "ai_product": "Firefox",
    "ai_version": "140.10, 150",
    "ai_score": 9.8
}