CVE-2026-8090

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-8090
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.

7.3 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 3.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact LOW

Scope UNCHANGED

References
Link Resource
https://bugzilla.mozilla.org/show_bug.cgi?id=2034352 Permissions Required
https://www.mozilla.org/security/advisories/mfsa2026-40/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-41/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-42/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-43/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-44/ Vendor Advisory
Configurations

Configuration 1 (hide)

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:*:*:*:*:-:*:*:*
History

08 May 2026, 20:08

Type Values Removed Values Added
First Time Mozilla thunderbird
Mozilla
Mozilla firefox
CPE cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:esr:*:*:*
cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*
cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*
References () https://bugzilla.mozilla.org/show_bug.cgi?id=2034352 - () https://bugzilla.mozilla.org/show_bug.cgi?id=2034352 - Permissions Required
References () https://www.mozilla.org/security/advisories/mfsa2026-40/ - () https://www.mozilla.org/security/advisories/mfsa2026-40/ - Vendor Advisory
References () https://www.mozilla.org/security/advisories/mfsa2026-41/ - () https://www.mozilla.org/security/advisories/mfsa2026-41/ - Vendor Advisory
References () https://www.mozilla.org/security/advisories/mfsa2026-42/ - () https://www.mozilla.org/security/advisories/mfsa2026-42/ - Vendor Advisory
References () https://www.mozilla.org/security/advisories/mfsa2026-43/ - () https://www.mozilla.org/security/advisories/mfsa2026-43/ - Vendor Advisory
References () https://www.mozilla.org/security/advisories/mfsa2026-44/ - () https://www.mozilla.org/security/advisories/mfsa2026-44/ - Vendor Advisory

08 May 2026, 13:16

Type Values Removed Values Added
Summary (en) 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. (en) 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
  • () https://www.mozilla.org/security/advisories/mfsa2026-43/ -
  • () https://www.mozilla.org/security/advisories/mfsa2026-44/ -

07 May 2026, 15:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-05-07 13:16

Updated : 2026-05-08 20:08

NVD link : CVE-2026-8090

Mitre link : CVE-2026-8090

CVE.ORG link : CVE-2026-8090

JSON object : View

Products Affected

mozilla

  • firefox
  • thunderbird
CWE
CWE-416

Use After Free