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CVE-2026-119277— MariaDB Connector/J: Rogue server can make the client read past the packet through server-declared lengths

Quick assessment

Affected
mariadb-corporation mariadb-connector-j
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 Connector/J 是用于将 Java 应用程序连接到 MariaDB 和 MySQL 数据库的驱动组件。在 3.0.0 至 3.3.7、3.4.5 和 3.5.11 版本中，处理 OK 数据包会话状态块、列定义数据包、文本行数据或二进制行数据的解码器，直接使用了服务端声明的长度，而未验证请求的字节是否仍在接收缓冲区范围内。这导致解码器可能在数据包边界之外执行读取定位、创建子缓冲区或解码字符串。恶意或被入侵的服务器，以及中间人攻击者，可借此触发 JDBC 调用中未检查的 或 异常，从而中断连接处

CVSS 5.9 · Medium

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-119277

Vulnerability Information
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Vulnerability Title
MariaDB Connector/J: Rogue server can make the client read past the packet through server-declared lengths
Source: CVE Program / CVE List V5
Vulnerability Description
MariaDB Connector/J is used to connect applications developed in Java to MariaDB and MySQL databases. From 3.0.0 until 3.3.7, 3.4.5, and 3.5.11, decoders for OK packet session-state blocks, column definition packets, text row data, or binary row data used server-declared lengths without confirming that the requested bytes remained in the receive buffer. The decoders could position reads, create sub-buffers, or decode strings beyond the packet boundary. A malicious or compromised server, or a machine-in-the-middle attacker, could trigger unchecked ArrayIndexOutOfBoundsException or IllegalArgumentException failures inside JDBC calls and terminate connection handling. This issue is fixed in versions 3.3.7, 3.4.5, and 3.5.11.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
mariadb-corporation mariadb-connector-j >= 3.0.0, < 3.3.7 -

II. Public POCs for CVE-2026-119277

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III. Intelligence Information for CVE-2026-119277

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Other References for CVE-2026-119277 (7)

Same Patch Batch · mariadb-corporation · 2026-10-29 · 7 CVEs total

CVE-2026-119210 5.9 MEDIUM MariaDB Connector/J: LOAD DATA LOCAL INFILE file check could be satisfied by text inside q
CVE-2026-119281 5.9 MEDIUM MariaDB Connector/J: Server could switch character_set_results away from UTF-8 without the
CVE-2026-119276 5.9 MEDIUM MariaDB Connector/J: Rogue server can drive large heap allocations from server-declared le
CVE-2026-119279 5.9 MEDIUM MariaDB Connector/J: Length-encoded integers larger than Integer.MAX_VALUE were truncated
CVE-2026-119278 5.9 MEDIUM MariaDB Connector/J: Rogue server can crash the client during caching_sha2_password authen
CVE-2026-119280 3.7 LOW MariaDB Connector/J : XA recover() trusted server-supplied gtrid and bqual lengths

IV. Related Vulnerabilities

Same product: mariadb-connector-j
Same vendor: mariadb-corporation
Same weakness: CWE-125