CVE-2026-74865: Yunohost-Apps Sogo Yhn

Critical severity, CVSS 9.2. EPSS: 0.4% chance of exploitation in the next 30 days.

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.

Affected products

• Yunohost-Apps Sogo Yhn: before 5.8.0~ynh9 (fixed in 5.8.0~ynh9)

Published 2026-09-30. Last modified 2026-09-30.