CVE-2026-12289

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-12289
Privilege escalation in the Graphics: WebRender component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 152, and Thunderbird 140.12.

8.8 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://bugzilla.mozilla.org/show_bug.cgi?id=2023443 Permissions Required
https://www.mozilla.org/security/advisories/mfsa2026-57/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-58/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-59/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-60/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-61/ 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:*:*:*:*:-:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:esr:*:*:*
History

16 Jun 2026, 20:34

Type Values Removed Values Added
CPE cpe:2.3:a:mozilla:thunderbird:*:*:*:*:esr:*:*:*
cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*
cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*
References () https://bugzilla.mozilla.org/show_bug.cgi?id=2023443 - () https://bugzilla.mozilla.org/show_bug.cgi?id=2023443 - Permissions Required
References () https://www.mozilla.org/security/advisories/mfsa2026-57/ - () https://www.mozilla.org/security/advisories/mfsa2026-57/ - Vendor Advisory
References () https://www.mozilla.org/security/advisories/mfsa2026-58/ - () https://www.mozilla.org/security/advisories/mfsa2026-58/ - Vendor Advisory
References () https://www.mozilla.org/security/advisories/mfsa2026-59/ - () https://www.mozilla.org/security/advisories/mfsa2026-59/ - Vendor Advisory
References () https://www.mozilla.org/security/advisories/mfsa2026-60/ - () https://www.mozilla.org/security/advisories/mfsa2026-60/ - Vendor Advisory
References () https://www.mozilla.org/security/advisories/mfsa2026-61/ - () https://www.mozilla.org/security/advisories/mfsa2026-61/ - Vendor Advisory
First Time Mozilla
Mozilla thunderbird
Mozilla firefox

16 Jun 2026, 17:16

Type Values Removed Values Added
References
  • () https://www.mozilla.org/security/advisories/mfsa2026-60/ -
  • () https://www.mozilla.org/security/advisories/mfsa2026-61/ -
Summary (en) Privilege escalation in the Graphics: WebRender component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, and Firefox ESR 115.37. (en) Privilege escalation in the Graphics: WebRender component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 152, and Thunderbird 140.12.

16 Jun 2026, 15:16

Type Values Removed Values Added
CWE CWE-269
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 8.8

16 Jun 2026, 13:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-06-16 13:16

Updated : 2026-06-16 20:34

NVD link : CVE-2026-12289

Mitre link : CVE-2026-12289

CVE.ORG link : CVE-2026-12289

JSON object : View

Products Affected

mozilla

  • firefox
  • thunderbird
CWE
CWE-269

Improper Privilege Management