CVE-2026-107822
MariaDB: database privilege escalation via user / role name collision in the acl cache
CVSS Score
6.4
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-706 CWE-863 |
| Vendor | mariadb |
| Product | server |
| Published | Oct 9, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
High
Privileges Required
High
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
MariaDB / server
>= 10.6.1, < 10.6.28 >= 10.11.1, < 10.11.19 >= 11.4.1, < 11.4.13 >= 11.8.1, < 11.8.9 >= 12.3.1, < 12.3.3 >= 13.0.1, < 13.0.2
References
github.com: https://github.com/MariaDB/server/security/advisories/GHSA-2m85-2x26-36rf github.com: https://github.com/MariaDB/server/commit/67ea07dd3400004e4f7ae01bf977f4344bbe064b github.com: https://github.com/MariaDB/server/releases/tag/mariadb-10.11.19 github.com: https://github.com/MariaDB/server/releases/tag/mariadb-10.6.28 github.com: https://github.com/MariaDB/server/releases/tag/mariadb-11.4.13 github.com: https://github.com/MariaDB/server/releases/tag/mariadb-11.8.9 github.com: https://github.com/MariaDB/server/releases/tag/mariadb-12.3.3 github.com: https://github.com/MariaDB/server/releases/tag/mariadb-13.0.2 jira.mariadb.org: https://jira.mariadb.org/browse/MDEV-40541