CVE-2026-74864
Authentication Bypass in sogo_yhn
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.
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-2026-74864
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.
- Ensure Nginx properly handles or strips the header.
- Review SOGo and Nginx configuration settings.
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CVE-2026-74864 vulnerability anywhere in the article.