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.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mozilla | Thunderbird | affected |
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Project Subscriptions
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Advisories
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Fixes
Solution
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Workaround
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References
History
Tue, 13 Oct 2026 18:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | Denial-of-service in the Exchange email component | |
| References |
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Projects
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MITRE
Status: PUBLISHED
Assigner: mozilla
Published:
Updated: 2026-10-13T18:16:44.469Z
Reserved: 2026-10-13T18:08:37.893Z
Link: CVE-2026-110249
Vulnrichment
No data.
NVD
Status : Awaiting Analysis
Published: 2026-10-13T19:18:49.590
Modified: 2026-10-13T19:30:29.797
Link: CVE-2026-110249
Redhat
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OpenCVE Enrichment
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Weaknesses
No weakness.