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CVE-2026-102523MariaDB server: Authorization bypass via ALTER TABLE ... CONVERT ... PARTITION
MariaDB server is a community developed fork of MySQL server. From 10.11.1 until 10.11.19, 11.4.13, 11.8.9, 12.3.3, and 13.0.2, ALTER TABLE ... CONVERT ... PARTITION does not apply filename encoding to user-specified partition names before using them in filesystem path construction. An authenticated database user can use a partition name requiring filename escaping to make the conversion operate on table files the user is not authorized to access, allowing unauthorized table reads or modifications. This issue is fixed in versions 10.11.19, 11.4.13, 11.8.9, 12.3.3, and 13.0.2.
8.0 HIGHEPSS 0.56%Not in KEVNVD: Awaiting Analysis
Overview
Severity
| Score | Severity | Version | Vector String |
|---|---|---|---|
| 8.0 | HIGH | 3.1GitHub_M (CNA) | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H |
Details
- CVE ID
- CVE-2026-102523
- Status
- Awaiting Analysis
- Assigner (CNA)
- GitHub_M
- Published
- Nov 5, 2026
- Last modified
- 2026-11-06 21:29 UTC
- Weaknesses
- CWE-73 · External Control of File Name or Path
Affected Products
As published by the CNA in the CVE record.
MariaDBserver5 version ranges
- >= 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/commit/98437c30ae52ed709f266e5f8095d779261a5879
- github.com https://github.com/MariaDB/server/releases/tag/mariadb-10.11.19
- 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
- github.com https://github.com/MariaDB/server/security/advisories/GHSA-h4vr-wpff-jfx4
- jira.mariadb.org https://jira.mariadb.org/browse/MDEV-40413