Is CVE-2026-119276 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-119276 being exploited in the wild.

How severe is CVE-2026-119276?

Medium severity, with a CVSS score of 5.9, published 29 October 2026.

Which products and versions are affected?

MariaDB Connector/J 3.0.0 to 3.3.6, 3.4.0 to 3.4.4, 3.5.0 to 3.5.10; org.mariadb.jdbc:mariadb-java-client (Maven) >= 3.0.0, < 3.3.7, ECOSYSTEM:introduced=3.0.0,fixed=3.3.7.

Is there a fix for CVE-2026-119276?

Yes. org.mariadb.jdbc:mariadb-java-client (Maven): upgrade to 3.3.7 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-119276 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-119276?

Check whether you run MariaDB Connector/J or org.mariadb.jdbc:mariadb-java-client (Maven) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-119276: MariaDB Connector/J heap allocation denial of service

Q: Is there a fix for CVE-2026-119276?

Yes. org.mariadb.jdbc:mariadb-java-client (Maven): upgrade to 3.3.7 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

Q: How is CVE-2026-119276 attacked?

It is attacked over the network, in a software library.

Q: Am I affected by CVE-2026-119276?

Check whether you run MariaDB Connector/J or org.mariadb.jdbc:mariadb-java-client (Maven) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-119276 · Severity: medium · CVSS 5.9 · Published 2026-10-29

MariaDB Connector/J is a library that allows Java applications to connect to MariaDB and MySQL databases. When communicating with a malicious or compromised database server, the connector can be forced to repeatedly allocate large amounts of memory based on server-supplied packet sizes, causing garbage collection pressure or application crashes due to out-of-memory errors.

Technologies: MariaDB Connector/J, org.mariadb.jdbc:mariadb-java-client (Maven). Vendors: Mariadb, Maven.

Quick answers

Is CVE-2026-119276 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-119276 being exploited in the wild.
How severe is CVE-2026-119276?: Medium severity, with a CVSS score of 5.9, published 29 October 2026.
Which products and versions are affected?: MariaDB Connector/J 3.0.0 to 3.3.6, 3.4.0 to 3.4.4, 3.5.0 to 3.5.10; org.mariadb.jdbc:mariadb-java-client (Maven) >= 3.0.0, < 3.3.7, ECOSYSTEM:introduced=3.0.0,fixed=3.3.7.
Is there a fix for CVE-2026-119276?: Yes. org.mariadb.jdbc:mariadb-java-client (Maven): upgrade to 3.3.7 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-119276 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-119276?: Check whether you run MariaDB Connector/J or org.mariadb.jdbc:mariadb-java-client (Maven) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

org.mariadb.jdbc:mariadb-java-client (Maven): upgrade to 3.3.7 or later

# set org.mariadb.jdbc:mariadb-java-client to 3.3.7 in your pom.xml or build.gradle

Technical details

The vulnerability exists in the OkPacket.parse() and OkPacket.parseWithInfo() code paths when CLIENT_SESSION_TRACK capability negotiation is enabled. The parser reads server-declared lengths from the OK packet's info field and session-state variable names/values, then allocates byte arrays before validating that the declared bytes remain in the packet. A network-based attacker controlling the database server can send malformed OK packets with exaggerated length declarations to trigger repeated heap allocations, exhausting client memory.

Affected products

MariaDB Connector/J 3.0.0 to 3.3.6, 3.4.0 to 3.4.4, 3.5.0 to 3.5.10

Identifiers

CVE-2026-119276
GHSA-h599-m3w5-9m7x

Timeline

2026-10-29: disclosed

References

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.