Use-after-free in the DOM: HTML Parser component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, Thunderbird 140.16, and Thunderbird 153.3.

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable no

Technical Impact total

Affected Vendors & Products

Vendors Products
Mozilla
  • Firefox
  • Thunderbird

Configuration 1 [-]

OR cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*

No data.

References
Link Providers
https://bugzilla.mozilla.org/show_bug.cgi?id=2068059 cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-92022 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-92022 cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-90/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-91/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-92/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-92/#CVE-2026-92022 cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-93/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-94/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-95/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-95/#CVE-2026-92022 cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-96/ cve-icon cve-icon
History

Tue, 06 Oct 2026 14:45:00 +0000

Type Values Removed Values Added
First Time appeared Mozilla thunderbird
CPEs cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
Vendors & Products Mozilla thunderbird

Sun, 20 Sep 2026 01:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-416
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H'}

 ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'}

Thu, 17 Sep 2026 20:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-416

Thu, 17 Sep 2026 12:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-825
References
Metrics threat_severity

None

 cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H'}

threat_severity

Important

Wed, 16 Sep 2026 14:45:00 +0000

Type Values Removed Values Added
Description Use-after-free in the DOM: HTML Parser component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 140.16. Use-after-free in the DOM: HTML Parser component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, Thunderbird 140.16, and Thunderbird 153.3.
References

Wed, 16 Sep 2026 04:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-416

Tue, 15 Sep 2026 20:15:00 +0000

Type Values Removed Values Added
Description Use-after-free in the DOM: HTML Parser component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, Firefox ESR 153.3, and Thunderbird 140.16. Use-after-free in the DOM: HTML Parser component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 140.16.
References

Tue, 15 Sep 2026 20:00:00 +0000

Type Values Removed Values Added
Description Use-after-free in the DOM: HTML Parser component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, and Firefox ESR 153.3. Use-after-free in the DOM: HTML Parser component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, Firefox ESR 153.3, and Thunderbird 140.16.
References

Tue, 15 Sep 2026 14:45:00 +0000

Type Values Removed Values Added
First Time appeared Mozilla
Mozilla firefox
Vendors & Products Mozilla
Mozilla firefox

Tue, 15 Sep 2026 12:45:00 +0000

Type Values Removed Values Added
Description Use-after-free in the DOM: HTML Parser component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, and Firefox ESR 153.3.
Title Use-after-free in the DOM: HTML Parser component
References
cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published: 2026-09-15T12:33:42.587Z

Updated: 2026-09-20T00:17:09.497Z

Reserved: 2026-09-15T12:33:41.660Z

Link: CVE-2026-92022

cve-icon Vulnrichment

Updated: 2026-09-20T00:17:03.378Z

cve-icon NVD

Status : Analyzed

Published: 2026-09-15T13:16:52.337

Modified: 2026-10-06T14:38:48.513

Link: CVE-2026-92022

cve-icon Redhat

Severity : Important

Publid Date: 2026-09-15T12:33:42Z

Links: CVE-2026-92022 - Bugzilla