5.9
Medium
CVE-2026-113866 When setting up an account, Thunderbird's Exchange AutoDiscover lookup also queried the domain's AutoDiscover service…
Description
When setting up an account, Thunderbird's Exchange AutoDiscover lookup also queried the domain's AutoDiscover service over plain HTTP. Due to a bug, that unencrypted request included the credentials the user had entered, allowing a network attacker to obtain the user's password. This vulnerability was fixed in Thunderbird 158.0.1 and Thunderbird 153.5.1.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Thunderbird 158.0 | earliest → < 158.0.1 | 158.0.1 |
| Thunderbird 153.5 | earliest → < 153.5.1 | 153.5.1 |
References
- bugzilla.mozilla.org bugzilla.mozilla.org
- www.mozilla.org www.mozilla.org
- www.mozilla.org www.mozilla.org
Timeline
- Published
- Last modified
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