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CVE-2026-107821— MariaDB: insufficient validation of binary frm data when opening a table

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分支。在 10.6.1 到 10.6.28、10.11.19、11.4.13、11.8.9、12.3.3 和 13.0.2 版本之间，MariaDB 在打开二进制 FRM 文件时，对 FRM 元数据中的计数、偏移量、长度和字段边界的验证不足。攻击者若能够将构造的 FRM 文件放置在数据目录中，可能触发越界读取或写入操作、导致服务器崩溃，甚至可能执行任意代码。此问题已在 10.6.28、10.11.19、11.4.13、11.8.9、12.3.3 和 13.0

CVSS 8.0 · High EPSS 0.48% · P39

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

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-2026-107821

Vulnerability Information
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Vulnerability Title
MariaDB: insufficient validation of binary frm data when opening a table
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, MariaDB insufficiently validated counts, offsets, lengths, and field boundaries in FRM metadata while opening binary FRM files. An attacker able to place a crafted FRM file in the data directory could trigger out-of-bounds reads or writes, crash the server, or potentially execute code. 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:H/PR:H/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1285
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-2026-107821

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III. Intelligence Information for CVE-2026-107821

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Patches & Fixes for CVE-2026-107821 (2)

Vendor Advisories for CVE-2026-107821 (1)

Vendor Pages for CVE-2026-107821 (4)

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-2026-107818 8.4 HIGH MariaDB: environment injection via wsrep bootstrap in the mariadb.service file
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-1285

V. Comments for CVE-2026-107821

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