CVE-2026-74864Authentication Bypass in sogo_yhn
Updated under an hour ago ()
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It affects YunoHost-Apps sogo_yhn. Add what you run to find out whether that includes you.
EPSS puts the chance of exploitation in the next 30 days at 0.41%, higher than 33% of scored CVEs.
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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.
- CVSS
- 9.3 CRITICAL (v4.0, CNA)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
- Weakness (CWE)
- CWE-639
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 0.41% (percentile 33)
- Assigned by
- CERT-PL
- NVD analysis
- Deferred
- Record last updated
- Sep 30, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
YunoHost-Apps sogo_yhn yunohost_apps:sogo_yhn (from the name) | before 5.8.0~ynh9 | CNA record |
References
- https://cert.pl/en/posts/2026/09/CVE-2026-74864third-party-advisory
- https://forum.yunohost.org/t/sogo-critical-vulnerability-fixed-in-5-8-0-ynh9/42699issue-tracking
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.