CVE-2026-2801

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-2801
Incorrect boundary conditions in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 148 and Thunderbird 148.

7.5 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://bugzilla.mozilla.org/show_bug.cgi?id=2009901 Permissions Required
https://www.mozilla.org/security/advisories/mfsa2026-13/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-16/ Vendor Advisory
Configurations

Configuration 1 (hide)

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

13 Apr 2026, 15:17

Type Values Removed Values Added
Summary
  • (es) Condiciones de contorno incorrectas en el componente JavaScript: WebAssembly. Esta vulnerabilidad afecta a Firefox < 148 y Thunderbird < 148.
Summary (en) Incorrect boundary conditions in the JavaScript: WebAssembly component. This vulnerability affects Firefox < 148 and Thunderbird < 148. (en) Incorrect boundary conditions in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 148 and Thunderbird 148.

25 Feb 2026, 18:47

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 7.5
References () https://bugzilla.mozilla.org/show_bug.cgi?id=2009901 - () https://bugzilla.mozilla.org/show_bug.cgi?id=2009901 - Permissions Required
References () https://www.mozilla.org/security/advisories/mfsa2026-13/ - () https://www.mozilla.org/security/advisories/mfsa2026-13/ - Vendor Advisory
References () https://www.mozilla.org/security/advisories/mfsa2026-16/ - () https://www.mozilla.org/security/advisories/mfsa2026-16/ - Vendor Advisory
First Time Mozilla
Mozilla firefox
Mozilla thunderbird
CWE CWE-754
CPE cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*

24 Feb 2026, 18:29

Type Values Removed Values Added
References
  • () https://www.mozilla.org/security/advisories/mfsa2026-16/ -
Summary (en) Incorrect boundary conditions in the JavaScript: WebAssembly component. This vulnerability affects Firefox < 148. (en) Incorrect boundary conditions in the JavaScript: WebAssembly component. This vulnerability affects Firefox < 148 and Thunderbird < 148.

24 Feb 2026, 14:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-02-24 14:16

Updated : 2026-04-13 15:17

NVD link : CVE-2026-2801

Mitre link : CVE-2026-2801

CVE.ORG link : CVE-2026-2801

JSON object : View

Products Affected

mozilla

  • firefox
  • thunderbird
CWE
CWE-754

Improper Check for Unusual or Exceptional Conditions