CVE-2026-74865

Authentication Bypass in sogo_yhn

Published Sep 30, 2026 CVSS 4.0 · 9.2 Critical EPSS < 1% KEV · Not listed
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.

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': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

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

{'score': 9.2, 'vector': 'CVSS:4.0/AV:N/AC:H/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