CVE-2026-57963

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...

CVE-2026-57963 Chat UI manipulation by injection

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...

CVE-2026-57963

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...

CVE-2026-57962 Denial-of-service via malicious LDAP address-book server

A malicious LDAP server, which a Thunderbird user is configured to query for address-book autocomplete, can stash arbitrarily large amounts of attacker-supplied data into the Thunderbird LDAP client until it crashes due to memory exhaustion. This vulnerability was fixed in Thunderbird 152.0.1 and...

CVE-2026-57962

CVE-2026-57962 affects Thunderbird’s LDAP address-book autocomplete. A malicious LDAP server can cause the Thunderbird LDAP client to stash attacker-supplied data, enabling memory exhaustion and a denial of service. Root cause is unbounded data processing by the LDAP client when queried by the Th...