Vulnerability · Published May 18, 2026 · Assigned by VulnCheck

CVE-2026-8851SOGo < 5.12.8 SQL Injection via addUserInAcls endpoint

High 8.1

In plain English

A high-severity SQL injection in SOGo Webmail from Alinto. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 25% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.1High

Exploit odds (30 days)0.3%top 75.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:12	sogo	5.8.0-2+deb12u3	DEBIAN-CVE-2026-8851
Debian:13	sogo	5.12.1-3+deb13u2	DEBIAN-CVE-2026-8851
Ubuntu:25.10	sogo	no fix listed	UBUNTU-CVE-2026-8851

Affected products (as reported)

Vendor	Product	Versions
Alinto	SOGo Webmail	0 – through 5.12.7

Weakness: CWE-89 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

References

https://github.com/Alinto/sogo/releases/tag/SOGo-5.12.8 issue-tracking
https://www.sogo.nu/news/2026/sogo-v5128-released.html patch
https://www.vulncheck.com/advisories/sogo-sql-injection-via-adduserinacls-endpoint third-party-advisory