CVE-2026-74865

Critical

Description

sogo_yhn configures SOGo with a parameter "SOGoTrustProxyAuthentication=YES". This causes the password to be bypassed during HTTP Basic authentication. An unauthenticated attacker who provides the username of an existing user and any arbitrary password can successfully log in to that user's account. This issue was fixed in version 5.8.0~ynh9.

SeverityCritical

CVSS9.2

Exploit probability—

ProductYunohost-apps Sogo Yhn

PublishedSep 30, 2026

First seenSep 30, 2026

Weakness typeCWE-639Authorization bypass through user-controlled key

How to fix

Update

YunoHost-Apps sogo_yhn5.8.0~ynh9 or later

Affected products

Product	Affected versions	Fixed in
YunoHost-Apps sogo_yhn	v < 5.8.0~ynh9	5.8.0~ynh9

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