Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component. This vulnerability was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.
History

Mon, 13 Apr 2026 14:30:00 +0000

Type Values Removed Values Added
Description Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component. This vulnerability affects Firefox < 149, Firefox ESR < 115.34, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9. Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component. This vulnerability was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.

Thu, 26 Mar 2026 00:15:00 +0000


Wed, 25 Mar 2026 15:45:00 +0000

Type Values Removed Values Added
First Time appeared Mozilla thunderbird
Weaknesses CWE-754
CPEs 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:*:*:*
Vendors & Products Mozilla thunderbird

Wed, 25 Mar 2026 14:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-120
CWE-190
Metrics cvssV3_1

{'score': 10, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 25 Mar 2026 12:00:00 +0000

Type Values Removed Values Added
First Time appeared Mozilla
Mozilla firefox
Mozilla firefox Esr
Vendors & Products Mozilla
Mozilla firefox
Mozilla firefox Esr

Tue, 24 Mar 2026 20:30:00 +0000

Type Values Removed Values Added
Description Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component. This vulnerability affects Firefox < 149, Firefox ESR < 115.34, and Firefox ESR < 140.9. Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component. This vulnerability affects Firefox < 149, Firefox ESR < 115.34, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.
References

Tue, 24 Mar 2026 12:45:00 +0000

Type Values Removed Values Added
Description Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component. This vulnerability affects Firefox < 149, Firefox ESR < 115.34, and Firefox ESR < 140.9.
Title Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component
References

cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published: 2026-03-24T12:30:23.260Z

Updated: 2026-04-13T13:48:38.103Z

Reserved: 2026-03-23T23:21:39.901Z

Link: CVE-2026-4689

cve-icon Vulnrichment

Updated: 2026-03-25T13:17:12.774Z

cve-icon NVD

Status : Modified

Published: 2026-03-24T13:16:04.737

Modified: 2026-04-13T15:17:37.393

Link: CVE-2026-4689

cve-icon Redhat

Severity : Important

Publid Date: 2026-03-24T12:30:23Z

Links: CVE-2026-4689 - Bugzilla