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VULNERABILITIES

CVE-2026-110249 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: CISA-ADPCVSS-B:8.6 HIGHVector:CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://bugzilla.mozilla.org/show_bug.cgi?id=2077826 [email protected]
https://www.mozilla.org/security/advisories/mfsa2026-109/ [email protected]
https://www.mozilla.org/security/advisories/mfsa2026-110/ [email protected]

Weakness Enumeration

CWE-IDCWE NameSource
CWE-400Uncontrolled Resource ConsumptionCISA-ADP

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-110249
NVD Published Date:
Oct 13, 2026
NVD Last Modified:
Oct 20, 2026
Source:
[email protected]
CVE-2026-110249 Details - Not Deferred