CVE-2026-110249
Fixed in a distro release EPSS <1%CVSS 8.6
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.
Products: Mozilla Thunderbird
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Debian 12 | thunderbird | no fix |
| Debian 13 | thunderbird | 1:153.5.1esr-1~deb13u1 |
| Debian 14 | thunderbird | 1:153.5.0esr-1 |
| SUSE Linux Enterprise Module for Package Hub 15 SP7 | MozillaThunderbird | 153.5.0-150400.13.9.1 |
| SUSE Linux Enterprise Workstation Extension 15 SP7 | MozillaThunderbird | 153.5.0-150400.13.9.1 |
| Ubuntu 22.04 LTS | thunderbird | no fix |
| Ubuntu 24.04 LTS | thunderbird | no fix |
| Ubuntu 26.04 LTS | thunderbird | no fix |
| Ubuntu 26.10 | thunderbird | no fix |
| openSUSE Tumbleweed | MozillaThunderbird | 153.5.1-1.1 |