CVE-2026-4723

Critical CVSS: 9.8

Use-after-free in the JavaScript Engine component. This vulnerability affects Firefox < 149 and Thunderbird < 149.

Vendor

Product

CWE

Yayın Tarihi

2026-03-24 13:16:08

Güncelleme

2026-03-25 20:16:37

Source Identifier

security@mozilla.org

KEV Date Added

CWE-416 Firefox CRITICAL Mozilla 2026

https://bugzilla.mozilla.org/show_bug.cgi?id=2013573 https://www.mozilla.org/security/advisories/mfsa2026-20/ https://www.mozilla.org/security/advisories/mfsa2026-23/

Medium

CVE-2026-3889

Spoofing issue in Thunderbird. This vulnerability affects Thunderbird < 149 and Thunderbird < 140.9.

High

CVE-2026-4371

A malicious mail server could send malformed strings with negative lengths, causing the parser to read memory outside th…

High

CVE-2026-4722

Privilege escalation in the IPC component. This vulnerability affects Firefox < 149 and Thunderbird < 149.

Critical

CVE-2026-4724

Undefined behavior in the Audio/Video component. This vulnerability affects Firefox < 149 and Thunderbird < 149.

Critical

CVE-2026-4725

Sandbox escape due to use-after-free in the Graphics: Canvas2D component. This vulnerability affects Firefox < 149 and T…

High

CVE-2026-4726

Denial-of-service in the XML component. This vulnerability affects Firefox < 149 and Thunderbird < 149.