CVE-2026-74864

Critical

Description

sogo_yhn configures SOGo with a parameter that forces the request with HTTP header "x-webobjects-remote-user" to be treated as sent by a verified user without performing password validation. Since Nginx does not strip this header, any client can supply it arbitrarily and gain access as any user, including a privileged user, without providing a password. This issue was fixed in version 5.8.0~ynh9.

SeverityCritical

CVSS9.3

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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