What is GHSA-6c7w-fhrm-qhj3?

GHSA-6c7w-fhrm-qhj3 is a security advisory published by GitHub Security Advisories with Medium severity. When setting up an account, Thunderbird's Exchange AutoDiscover lookup also queried the domain's...

Which CVE IDs does GHSA-6c7w-fhrm-qhj3 cover?

GHSA-6c7w-fhrm-qhj3 covers the following CVE IDs: CVE-2026-113866. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-6c7w-fhrm-qhj3?

GHSA-6c7w-fhrm-qhj3 has a CVSS v3 base score of 5.9, published by GitHub Security Advisories.

GHSA-6c7w-fhrm-qhj3MediumCVSS 5.9

When setting up an account, Thunderbird's Exchange AutoDiscover lookup also queried the domain's...

Vendor

GitHub Security Advisories

Published

October 20, 2026

Last Modified

October 20, 2026

🔗 CVE IDs covered (1)

CVE-2026-113866 →

📋 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.

🔗 References (5)

https://nvd.nist.gov/vuln/detail/CVE-2026-113866
https://bugzilla.mozilla.org/show_bug.cgi?id=2080121
https://www.mozilla.org/security/advisories/mfsa2026-114
https://www.mozilla.org/security/advisories/mfsa2026-115
https://github.com/advisories/GHSA-6c7w-fhrm-qhj3