Mitigation bypass in the DOM: Security component_CVE-2026-8962

8.1 / 10

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

Description

Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.

Basic Information

ID CVE-2026-8962

Source mozilla

Published May 19, 2026 at 12:29

Modified May 20, 2026 at 15:46

Affected Product

Vendor Mozilla

Product Firefox

Version 140.11

CWE Classification

CWE-693

References

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    "lastseen": "",
    "description": "Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.",
    "published": "2026-05-19T12:29:59.947Z",
    "modified": "2026-05-20T15:46:25.018Z",
    "type": "cve",
    "title": "Mitigation bypass in the DOM: Security component",
    "source": "mozilla",
    "references": "https://bugzilla.mozilla.org/show_bug.cgi?id=2004804\nhttps://www.mozilla.org/security/advisories/mfsa2026-46/\nhttps://www.mozilla.org/security/advisories/mfsa2026-48/\nhttps://www.mozilla.org/security/advisories/mfsa2026-50/\nhttps://www.mozilla.org/security/advisories/mfsa2026-51/",
    "id": "CVE-2026-8962",
    "bulletinFamily": "",
    "cwe": [
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    "cvss": {
        "score": 8.1,
        "severity": "HIGH",
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        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
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        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
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    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Firefox",
    "version": "140.11",
    "vendor": "Mozilla",
    "ai_description": "",
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}