CVE-2026-74865Authentication 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 0.38%, higher than 30% of scored CVEs.
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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.
- CVSS
- 9.2 CRITICAL (v4.0, CNA)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
- Weakness (CWE)
- CWE-639
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 0.38% (percentile 30)
- 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.