CVE-2026-119277 MariaDB Connector/J: Rogue server can make the client read past the packet through server-declared lengths
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-119277?
CVE-2026-119277 is a medium-severity vulnerability in mariadb-corporation mariadb-connector-j, published on 29 Oct 2026.
Official 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.
Which versions are affected by CVE-2026-119277?
How do I fix CVE-2026-119277?
No fix has been published for CVE-2026-119277 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-119277 being exploited?
There is no known exploitation of CVE-2026-119277 in the wild and no public exploit code.