Use-after-free in the JavaScript Engine component_CVE-2026-6754

7.5 / 10

HIGH

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

Description

Use-after-free in the JavaScript Engine component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, and Firefox ESR 140.10.

Basic Information

ID CVE-2026-6754

Source mozilla

Published Apr 21, 2026 at 12:40

Modified Apr 21, 2026 at 17:47

Affected Product

Vendor Mozilla

Product Firefox

Version 115.35

CWE Classification

CWE-416

References

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    "lastseen": "",
    "description": "Use-after-free in the JavaScript Engine component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, and Firefox ESR 140.10.",
    "published": "2026-04-21T12:40:50.577Z",
    "modified": "2026-04-21T17:47:03.637Z",
    "type": "cve",
    "title": "Use-after-free in the JavaScript Engine component",
    "source": "mozilla",
    "references": "https://bugzilla.mozilla.org/show_bug.cgi?id=2027541\nhttps://www.mozilla.org/security/advisories/mfsa2026-30/\nhttps://www.mozilla.org/security/advisories/mfsa2026-31/\nhttps://www.mozilla.org/security/advisories/mfsa2026-32/",
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    "cvss": {
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        "version": "3.1"
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    "href": "",
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    "product": "Firefox",
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