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Advisory record · GHSA-h599-m3w5-9m7x

MariaDB Connector/J: Rogue server can drive large heap allocations from server-declared lengths in OK packets

CVSS 5.9 MediumEPSS 0.0035 · 28th percentile

Published by the GitHub Advisory Database at 30 Oct 2026, 23:00 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
org.mariadb.jdbc:mariadb-java-clientMaven>=3.0.0, <3.3.7 || >=3.4.0, <3.4.5 || >=3.5.0, <3.5.113.3.7, 3.4.5, 3.5.11
Identifiers
GHSA-h599-m3w5-9m7x · CVE-2026-119276
Weakness (CWE)
CWE-130 · CWE-789
Tags
Published
30 Oct 2026
Updated
30 Oct 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

MariaDB Connector/J versions 3.0.0 to before 3.3.7, 3.4.0 to before 3.4.5, and 3.5.0 to before 3.5.11 are affected. A rogue or man-in-the-middle server can send OK packets with oversized declared lengths, causing the client to allocate large amounts of heap memory, which can lead to OutOfMemoryError and denial of service. Upgrade to 3.3.7, 3.4.5, 3.5.11, or later.

Written 2 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
5.9 Medium 3.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0035, the 28th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:16 UTC First seen by agentprime
  2. 31 Oct 2026, 14:16 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.