CVE-2026-113867

Thunderbird did not escape attribute values when serializing outgoing XMPP stanzas. Because values from incoming requests were echoed back in automatic replies, a remote XMPP user could send a crafted request that caused Thunderbird to inject arbitrary stanzas into the user's connection, which th...

CVE-2026-113867

The Thunderbird chat feature with XMPP accounts is vulnerable to a stanza injection flaw. The root cause is the failure to escape attribute values when serializing outgoing XMPP stanzas. Because values from incoming requests are echoed in automatic replies, a remote XMPP user can send a crafted r...

EUVD-2026-105294

Thunderbird did not escape attribute values when serializing outgoing XMPP stanzas. Because values from incoming requests were echoed back in automatic replies, a remote XMPP user could send a crafted request that caused Thunderbird to inject arbitrary stanzas into the user's connection, which th...

CVE-2026-113867 Stanza injection in XMPP chat

Thunderbird did not escape attribute values when serializing outgoing XMPP stanzas. Because values from incoming requests were echoed back in automatic replies, a remote XMPP user could send a crafted request that caused Thunderbird to inject arbitrary stanzas into the user's connection, which th...

Security Vulnerabilities fixed in Thunderbird 153.5.1 — Mozilla

When setting up an account, Thunderbird's Exchange AutoDiscover lookup also queried the domain's AutoDiscover service over plain HTTP. Due to a bug, that unencrypted request included the credentials the user had entered, allowing a network attacker to obtain the user's password. Thunderbird did n...