CVE-2026-74865
Authentication Bypass in sogo_yhn
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.
INFO
Published Date :
Sept. 30, 2026, 12:02 p.m.
Last Modified :
Sept. 30, 2026, 12:02 p.m.
Remotely Exploit :
Yes !
Source :
CERT-PL
Affected Products
The following products are affected by CVE-2026-74865
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 4.0 | CRITICAL | 4bb8329e-dd38-46c1-aafb-9bf32bcb93c6 |
Solution
- Update SOGo to version 5.8.0~ynh9 or later.
- Verify the SOGoTrustProxyAuthentication setting is correctly configured.
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CVE-2026-74865 vulnerability anywhere in the article.