MariaDB: database privilege escalation via user / role name collision in the acl cache

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-107822
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-09 18:17:04 UTC
Updated2026-10-09 18:17:04 UTC
DescriptionMariaDB 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.

Risk And Classification

Primary CVSS: v3.1 6.4 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H

Problem Types: CWE-706 | CWE-863 | CWE-706 CWE-706: Use of Incorrectly-Resolved Name or Reference | CWE-863 CWE-863: Incorrect Authorization

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary6.4MEDIUMCVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H
3.1CNADECLARED6.4MEDIUMCVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
High
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA MariaDB Server affected >= 10.6.1, < 10.6.28 Not specified
CNA MariaDB Server affected >= 10.11.1, < 10.11.19 Not specified
CNA MariaDB Server affected >= 11.4.1, < 11.4.13 Not specified
CNA MariaDB Server affected >= 11.8.1, < 11.8.9 Not specified
CNA MariaDB Server affected >= 12.3.1, < 12.3.3 Not specified
CNA MariaDB Server affected >= 13.0.1, < 13.0.2 Not specified

References

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