Use-after-free in the DOM: Networking component. This vulnerability was fixed in Firefox 150.0.2, Firefox ESR 140.10.2, Firefox ESR 115.35.2, Thunderbird 150.0.2, and Thunderbird 140.10.2.

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact Low

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable yes

Technical Impact partial

Affected Vendors & Products

Vendors Products
Mozilla
  • Firefox
  • Thunderbird

Configuration 1 [-]

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

No data.

References
Link Providers
https://bugzilla.mozilla.org/show_bug.cgi?id=2034352 cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-8090 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-8090 cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-40/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-41/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-41/#CVE-2026-8090 cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-42/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-43/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-44/ cve-icon cve-icon
History

Sat, 09 May 2026 00:15:00 +0000

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

None

 threat_severity

Important

Fri, 08 May 2026 20:15:00 +0000

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

Fri, 08 May 2026 13:00:00 +0000

Type Values Removed Values Added
Description Use-after-free in the DOM: Networking component. This vulnerability was fixed in Firefox 150.0.2, Firefox ESR 140.10.2, and Firefox ESR 115.35.2. Use-after-free in the DOM: Networking component. This vulnerability was fixed in Firefox 150.0.2, Firefox ESR 140.10.2, Firefox ESR 115.35.2, Thunderbird 150.0.2, and Thunderbird 140.10.2.
References

Thu, 07 May 2026 15:00:00 +0000

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

Thu, 07 May 2026 14:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-416
Metrics cvssV3_1

{'score': 7.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Thu, 07 May 2026 13:00:00 +0000

Type Values Removed Values Added
Description Use-after-free in the DOM: Networking component. This vulnerability was fixed in Firefox 150.0.2, Firefox ESR 140.10.2, and Firefox ESR 115.35.2.
Title Use-after-free in the DOM: Networking component
References
cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published: 2026-05-07T12:45:04.609Z

Updated: 2026-05-08T12:19:00.246Z

Reserved: 2026-05-07T12:45:04.220Z

Link: CVE-2026-8090

cve-icon Vulnrichment

Updated: 2026-05-07T13:48:59.592Z

cve-icon NVD

Status : Analyzed

Published: 2026-05-07T13:16:13.967

Modified: 2026-05-08T20:08:50.323

Link: CVE-2026-8090

cve-icon Redhat

Severity : Important

Publid Date: 2026-05-07T12:45:04Z

Links: CVE-2026-8090 - Bugzilla