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CVE-2026-102523— MariaDB server: Authorization bypass via ALTER TABLE ... CONVERT ... PARTITION

Quick assessment

Affected
MariaDB server
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

MariaDB 服务器是 MySQL 服务器的社区开发分支。在 MariaDB 10.11.1 至 10.11.19、11.4.13、11.8.9、12.3.3 以及 13.0.2 版本中， 语句在构建文件系统路径之前，未对用户指定的分区名称应用文件名编码。经过身份验证的数据库用户可利用需要转义字符的分区名称，使转换操作作用于该用户无权访问的表文件，从而导致未经授权的表读取或修改。该问题已在版本 10.11.19、11.4.13、11.8.9、12.3.3 和 13.0.2 中修复。

CVSS 8.0 · High EPSS 0.56% · P47

Affected Version Matrix 5

VendorProduct Version RangeStatus
MariaDB server >= 10.11.1, < 10.11.19 affected
>= 11.4.1, < 11.4.13 affected
>= 11.8.1, < 11.8.9 affected
>= 12.3.1, < 12.3.3 affected
>= 13.0.1, < 13.0.2 affected
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I. Basic Information for CVE-2026-102523

Vulnerability Information
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Vulnerability Title
MariaDB server: Authorization bypass via ALTER TABLE ... CONVERT ... PARTITION
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
文件名或路径的外部可控制
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
MariaDB server >= 10.11.1, < 10.11.19 -

II. Public POCs for CVE-2026-102523

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III. Intelligence Information for CVE-2026-102523

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Patches & Fixes for CVE-2026-102523 (1)

Vendor Pages for CVE-2026-102523 (4)

Other References for CVE-2026-102523 (3)

IV. Related Vulnerabilities

Same product: server
Same vendor: MariaDB
Same weakness: CWE-73