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CVE-2026-107818— MariaDB: environment injection via wsrep bootstrap in the mariadb.service file

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 服务器的一个社区开发的分支。在版本 10.6.1 到 10.6.28、10.11.19、11.4.13、11.8.9、12.3.3 以及 13.0.2 之间，mariadb.service 单元在下次服务重启时会使用 /run/mysqld/wsrep-new-cluster。如果一个数据库用户拥有 FILE 权限，并且 secure-file-priv 配置允许向 /run/mysqld 写入文件，那么该用户可以创建此文件，并将攻击者控制的環境变量注入到重启后的服务中。此问题

CVSS 8.4 · High EPSS 0.34% · P26

Possible ATT&CK Techniques 1 AI

T1574.006 · Dynamic Linker Hijacking

Affected Version Matrix 6

VendorProduct Version RangeStatus
MariaDB server >= 10.6.1, < 10.6.28 affected
>= 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-2026-107818

Vulnerability Information
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Vulnerability Title
MariaDB: environment injection via wsrep bootstrap in the mariadb.service file
Source: CVE Program / CVE List V5
Vulnerability 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, the mariadb.service unit used /run/mysqld/wsrep-new-cluster during the next service restart. A database user with FILE privilege and a secure-file-priv configuration permitting writes to /run/mysqld could create that file and inject attacker-controlled environment values into the restarted service. 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
系统设置或配置在外部可控制
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
MariaDB server >= 10.6.1, < 10.6.28 -

II. Public POCs for CVE-2026-107818

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III. Intelligence Information for CVE-2026-107818

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Patches & Fixes for CVE-2026-107818 (1)

Vendor Advisories for CVE-2026-107818 (1)

Vendor Pages for CVE-2026-107818 (4)

Other References for CVE-2026-107818 (1)

Same Patch Batch · MariaDB · 2026-10-09 · 9 CVEs total

CVE-2026-107815 8.5 HIGH MariaDB: one byte OOB write in DOS tables of the CONNECT engine
CVE-2026-107814 8.4 HIGH MariaDB: Insecure $HOME in MariaDB rpm packages
CVE-2026-107821 8.0 HIGH MariaDB: insufficient validation of binary frm data when opening a table
CVE-2026-107823 7.2 HIGH MariaDB: privilege escalation via incorrect view frm parsing
CVE-2026-107816 6.4 MEDIUM MariaDB: `qc_info` plugin can do OOB reads if query contains \0
CVE-2026-107822 6.4 MEDIUM MariaDB: database privilege escalation via user / role name collision in the acl cache
CVE-2026-107819 5.9 MEDIUM MariaDB Connector/C: libmariadb allowed cleartext password leakage on TLS hostname verific
CVE-2026-107817 4.4 MEDIUM MariaDB: mysql_json plugin OOB reads

IV. Related Vulnerabilities

Same product: server
Same vendor: MariaDB
Same weakness: CWE-15

V. Comments for CVE-2026-107818

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