CVE-2026-2447

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-2447
Heap buffer overflow in libvpx. This vulnerability affects Firefox < 147.0.4, Firefox ESR < 140.7.1, Firefox ESR < 115.32.1, Thunderbird < 140.7.2, and Thunderbird < 147.0.2.

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=2014390 Issue Tracking Permissions Required
https://www.mozilla.org/security/advisories/mfsa2026-10/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-11/ Vendor Advisory
https://lists.debian.org/debian-lts-announce/2026/02/msg00028.html
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:*:*:*:*:*:*:*:*
History

22 Feb 2026, 21:16

Type Values Removed Values Added
References
  • () https://lists.debian.org/debian-lts-announce/2026/02/msg00028.html -

18 Feb 2026, 21:39

Type Values Removed Values Added
CPE cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*
First Time Mozilla
Mozilla firefox
Mozilla thunderbird
References () https://bugzilla.mozilla.org/show_bug.cgi?id=2014390 - () https://bugzilla.mozilla.org/show_bug.cgi?id=2014390 - Issue Tracking, Permissions Required
References () https://www.mozilla.org/security/advisories/mfsa2026-10/ - () https://www.mozilla.org/security/advisories/mfsa2026-10/ - Vendor Advisory
References () https://www.mozilla.org/security/advisories/mfsa2026-11/ - () https://www.mozilla.org/security/advisories/mfsa2026-11/ - Vendor Advisory

18 Feb 2026, 17:52

Type Values Removed Values Added
Summary
  • (es) Desbordamiento de búfer en el heap en libvpx. Esta vulnerabilidad afecta a Firefox &lt; 147.0.4, Firefox ESR &lt; 140.7.1, Firefox ESR &lt; 115.32.1, Thunderbird &lt; 140.7.2, y Thunderbird &lt; 147.0.2.

17 Feb 2026, 15:16

Type Values Removed Values Added
CWE CWE-122
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 8.8

16 Feb 2026, 16:19

Type Values Removed Values Added
References
  • () https://www.mozilla.org/security/advisories/mfsa2026-11/ -
Summary (en) Heap buffer overflow in libvpx. This vulnerability affects Firefox < 147.0.4, Firefox ESR < 140.7.1, and Firefox ESR < 115.32.1. (en) Heap buffer overflow in libvpx. This vulnerability affects Firefox < 147.0.4, Firefox ESR < 140.7.1, Firefox ESR < 115.32.1, Thunderbird < 140.7.2, and Thunderbird < 147.0.2.

16 Feb 2026, 15:18

Type Values Removed Values Added
New CVE
Information

Published : 2026-02-16 15:18

Updated : 2026-02-22 21:16

NVD link : CVE-2026-2447

Mitre link : CVE-2026-2447

CVE.ORG link : CVE-2026-2447

JSON object : View

Products Affected

mozilla

  • thunderbird
  • firefox
CWE
CWE-122

Heap-based Buffer Overflow