CVE-2026-12309

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-12309
Memory safety bug fixed in Thunderbird 152. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.

6.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References
Link Resource
https://bugzilla.mozilla.org/show_bug.cgi?id=2038476
https://www.mozilla.org/security/advisories/mfsa2026-57/
https://www.mozilla.org/security/advisories/mfsa2026-58/
https://www.mozilla.org/security/advisories/mfsa2026-60/
https://www.mozilla.org/security/advisories/mfsa2026-61/
Configurations

No configuration.

History

16 Jun 2026, 19:16

Type Values Removed Values Added
CWE CWE-119
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 6.5

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) Memory safety bug fixed in Firefox 152. This vulnerability was fixed in Firefox 152 and Firefox ESR 140.12. (en) Memory safety bug fixed in Thunderbird 152. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, 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 19:16

NVD link : CVE-2026-12309

Mitre link : CVE-2026-12309

CVE.ORG link : CVE-2026-12309

JSON object : View

Products Affected

No product.

CWE
CWE-119

Improper Restriction of Operations within the Bounds of a Memory Buffer