Unrated severityNVD Advisory· Published Oct 13, 2026· Updated Oct 13, 2026
CVE-2026-110249
CVE-2026-110249
Description
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.
Affected products
1- Range: before 158 and before 153.5
Patches
Vulnerability mechanics
References
3News mentions
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