CVEvulnerability

CVE-2026-113866

5.9 MEDIUM Published 2026-10-20 Modified 2026-10-22 Official page ↗
Status
Awaiting Analysis
Published
2026-10-20
Last modified
2026-10-22
Assigner
[email protected]
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
5.9 MEDIUM — CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Weaknesses
CWE-523

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.

Related

Weakness · CWE (1)

  • CWE-523 Unprotected Transport of Credentials weakness

References