CVE 9.8 CRITICAL

Mitigation bypass in the DOM: Security component_CVE-2026-6771

April 21, 2026 invoker category_cve

9.8 / 10

CRITICAL

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

Description

Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10.

AI Analysis

Mitigation bypass vulnerability in the DOM: Security component of Firefox

Basic Information

ID CVE-2026-6771

Source mozilla

Published Apr 21, 2026 at 12:41

Modified Apr 21, 2026 at 19:49

Affected Product

Vendor Mozilla

Product Firefox

Version 140.10

CWE Classification

CWE-288

AI Assessment

AI Score 9.8 / 10

AI Severity Critical

Vendor Mozilla

Product Firefox

Version 140.10, 150

References

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    "lastseen": "",
    "description": "Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10.",
    "published": "2026-04-21T12:41:03.920Z",
    "modified": "2026-04-21T19:49:00.441Z",
    "type": "cve",
    "title": "Mitigation bypass in the DOM: Security component",
    "source": "mozilla",
    "references": "https://bugzilla.mozilla.org/show_bug.cgi?id=2025067\nhttps://www.mozilla.org/security/advisories/mfsa2026-30/\nhttps://www.mozilla.org/security/advisories/mfsa2026-32/",
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    "cwe": [
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    "cvss": {
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        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
        "version": "3.1"
    },
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        "cvssV3": {
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    "href": "",
    "category_name": "CVE",
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    "product": "Firefox",
    "version": "140.10",
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    "ai_description": "Mitigation bypass vulnerability in the DOM: Security component of Firefox",
    "ai_severity": "Critical",
    "ai_vendor": "Mozilla",
    "ai_product": "Firefox",
    "ai_version": "140.10, 150",
    "ai_score": 9.8
}

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