CVE-2026-74865 json
Authentication Bypass in sogo_yhn
published 2026-09-30 40 d ago modified 2026-09-30 39 d ago also EUVD-2026-89797
- cvss
- 9.2
- version 4.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 32%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- YunoHost-Apps sogo_yhn 5.8.0~ynh9
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 40 d ago
Exploit prediction
0.38% chance of exploitation in the next 30 days, higher than 32% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 9.2 | 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 |
| CNA | 4.0 | 9.2 | 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected products
- YunoHost-Apps sogo_yhn
Classification
- Weakness
-
- CWE-639 Authorization Bypass Through User-Controlled Key
References
-
cert.pl
/en/posts/2026/09/CVE-2026-74864
third-party-advisory
-
forum.yunohost.org
/t/sogo-critical-vulnerability-fixed-in-5-8-0-ynh9/42699
issue-tracking
Sources
- CVE List CVE-2026-74865
- NVD CVE-2026-74865
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