CVE-2026-74864

Authentication Bypass in sogo_yhn

Published Sep 30, 2026 CVSS 4.0 · 9.3 Critical EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Yunohost-apps
Yunohost-apps sogo Yhn
Vendors & Products Yunohost-apps
Yunohost-apps sogo Yhn
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title Authentication Bypass in sogo_yhn
Weaknesses CWE-639
References
Metrics cvssV4_0

{'score': 9.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
CERT-PL
Published
Updated
Sep 30, 2026, 12:50 PM
Reserved
Aug 17, 2026, 10:19 AM
Status
Deferred
Published
Sep 30, 2026, 1:17 PM
Modified
Sep 30, 2026, 7:57 PM