CVE-2026-110249 Denial-of-service in the Exchange email component

A malicious, compromised, or MITM-controlled Exchange server can return a single well-formed SOAP response containing an element with enough attributes to keep Thunderbird's main thread CPU-bound for seconds to hours. This vulnerability was fixed in Thunderbird 158 and Thunderbird 153.5...

CVE-2026-110249 Denial-of-service in the Exchange email component

A malicious, compromised, or MITM-controlled Exchange server can return a single well-formed SOAP response containing an element with enough attributes to keep Thunderbird's main thread CPU-bound for seconds to hours. This vulnerability was fixed in Thunderbird 158 and Thunderbird 153.5...

CVE-2026-110249

Mozilla Thunderbird is affected by a Denial-of-Service (DoS) vulnerability in its Exchange email component . A malicious, compromised, or MITM-controlled Exchange server can return a single well-formed SOAP response containing an element with sufficient attributes to keep Thunderbird's main threa...