CVE-2026-12330

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-12330
Incorrect boundary conditions in the Internationalization component. This vulnerability was fixed in Firefox ESR 140.12, Firefox ESR 115.37, and Thunderbird 140.12.

5.4 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 2.8 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References
Link Resource
https://bugzilla.mozilla.org/show_bug.cgi?id=2029326 Permissions Required
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/mfsa2026-61/ Vendor Advisory
Configurations

Configuration 1 (hide)

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

16 Jun 2026, 20:56

Type Values Removed Values Added
First Time Mozilla
Mozilla thunderbird
Mozilla firefox
References () https://bugzilla.mozilla.org/show_bug.cgi?id=2029326 - () https://bugzilla.mozilla.org/show_bug.cgi?id=2029326 - Permissions Required
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/mfsa2026-61/ - () https://www.mozilla.org/security/advisories/mfsa2026-61/ - Vendor Advisory
CPE cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:esr:*:*:*

16 Jun 2026, 17:16

Type Values Removed Values Added
CWE CWE-119
References
  • () https://www.mozilla.org/security/advisories/mfsa2026-61/ -
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.4
Summary (en) Incorrect boundary conditions in the Internationalization component. This vulnerability was fixed in Firefox ESR 140.12 and Firefox ESR 115.37. (en) Incorrect boundary conditions in the Internationalization component. This vulnerability was fixed in Firefox ESR 140.12, Firefox ESR 115.37, and Thunderbird 140.12.

16 Jun 2026, 13:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-06-16 13:16

Updated : 2026-06-16 20:56

NVD link : CVE-2026-12330

Mitre link : CVE-2026-12330

CVE.ORG link : CVE-2026-12330

JSON object : View

Products Affected

mozilla

  • firefox
  • thunderbird
CWE
CWE-119

Improper Restriction of Operations within the Bounds of a Memory Buffer