CVE-2026-57963

Updated on 01 Jul 2026

Severity

6.5 Medium severity

Details

CVSS score
6.5
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Overview

About vulnerability

An attacker who can send HTML chat messages (via Matrix or XMPP) can inject arbitrary styled content, phishing links, and CSS that manipulates the chat UI. This vulnerability was fixed in Thunderbird 152.0.1 and Thunderbird 140.12.1.

Details

Affected product:
AlmaLinux 9.2 ESU
Affected packages:
thunderbird @ 115.4.1