SQL Injection in Alinto Sogo Webmail
CVE-2026-8851
SOGo versions 5.12.7 and prior contains a SQL injection vulnerability in the Access Control List management functionality that allows authenticated users to extract arbitrary data from the database by injecting SQL subqueries through the uid parameter of the addUserInAcls endpoint. Attackers can inject malicious SQL code to write extracted data into the sogo_acl table and retrieve it through the /acls API, establishing an out-of-band data exfiltration channel.
Vulnerability class: SQL Injection
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.004 (34.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 34th percentile — 34.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001
Affected products
- Alinto Sogo Webmail — versions 5.12.7, 5.12.8, 0
Weakness classification (CWE)
References
- github.com/Alinto/sogo/releases/tag/SOGo-5.12.8 (issue-tracking)
- www.sogo.nu/news/2026/sogo-v5128-released.html (patch)
- www.vulncheck.com/advisories/sogo-sql-injection-via-adduserinacls-endpoint (third-party-advisory)
Frequently asked questions
- What is CVE-2026-8851?
- CVE-2026-8851 is a high-severity vulnerability in Alinto Sogo Webmail, classified under SQL Injection. CVSS score: 8.1/10. Published 2026-05-18.
- How severe is CVE-2026-8851?
- High severity. CVSS v3 base score is 8.1 out of 10.