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Unrated severityNVD Advisory· Published Jul 2, 2026

Debian thunderbird: An attacker who can send HTML chat messages (via Matrix or XMPP) can inject arbi…

CVE-2026-57963

Description

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.

Affected products

1

Patches

Vulnerability mechanics

News mentions

0

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CVE-2026-57963 · VYPR