CVE-2026-119276
Dashboard / Vulnerabilities / CVE-2026-119276
Summary: MariaDB Connector/J: Rogue server can drive large heap allocations from server-declared lengths in OK packets
Details: 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, when CLIENT_SESSION_TRACK was negotiated, the OkPacket.parse() and OkPacket.parseWithInfo() paths allocated byte arrays using server-declared lengths for the OK packet info field and session-state variable names and values before confirming that the bytes remained in the packet. A malicious or compromised server, or a machine-in-the-middle attacker, could send a small OK packet declaring a much larger length and repeatedly force attacker-controlled heap allocations before the subsequent copy failed. This could create garbage-collection pressure or an OutOfMemoryError in the client application. This issue is fixed in versions 3.3.7, 3.4.5, and 3.5.11.
References: https://github.com/mariadb-corporation/mariadb-connector-j/releases/tag/3.3.7, https://github.com/mariadb-corporation/mariadb-connector-j/releases/tag/3.4.5, https://github.com/mariadb-corporation/mariadb-connector-j/releases/tag/3.5.11, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/119xxx/CVE-2026-119276.json, https://github.com/mariadb-corporation/mariadb-connector-j/security/advisories/GHSA-h599-m3w5-9m7x, https://nvd.nist.gov/vuln/detail/CVE-2026-119276, https://github.com/mariadb-corporation/mariadb-connector-j/commit/b9e1ee8d9b4d820d70719504cdfd5c97f1aede5f, https://github.com/mariadb-corporation/mariadb-connector-j/commit/beb445fcf9294113878fc05ac77f0efdf0596ac6, https://github.com/mariadb-corporation/mariadb-connector-j/commit/ea8c7b6537e50053444188a9a3fd9cae99550f56
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