CVE-2026-110249CWE-400denial-of-service

CVE-2026-110249

High · published October 13, 2026

CVSS v3.1
8.6
EPSS
0%
Percentile
4.1
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
8.6 · HIGH
Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00153 · 4.1th percentile
Weakness
CWE-400 · Uncontrolled Resource Consumption
Published
2026-10-13T23:18Z
References (3)
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]
EPSS history
Timeline
  • 15 OCT 03:28Z
    EPSS moved — → 0%
    epss
  • 13 OCT 18:08Z
    Denial-of-service in the Exchange email component
    cvelistv5
  • 13 OCT 18:08Z
    Denial-of-service in the Exchange email component
    cvelistv5