---
id: CVE-2026-11400
aliases:
  - GHSA-mhww-p97m-3368
title: 'AWS-JDBC Wrapper: Privilege Escalation in Aurora PostgreSQL instance'
summary: 'AWS-JDBC Wrapper: Privilege Escalation in Aurora PostgreSQL instance'
severity: high
cvss: 8
cwe:
  - CWE-426
vendor: amazon
product: 'software.amazon.jdbc:aws-advanced-jdbc-wrapper'
ecosystem: maven
affected:
  - 'software.amazon.jdbc:aws-advanced-jdbc-wrapper >= 3.0.0, < 4.0.1'
patched:
  - 'software.amazon.jdbc:aws-advanced-jdbc-wrapper 4.0.1'
published: '2026-07-17'
updated: '2026-07-17'
source: GHSA
sourceUrl: 'https://github.com/advisories/GHSA-mhww-p97m-3368'
references:
  - url: >-
      https://github.com/aws/aws-advanced-jdbc-wrapper/security/advisories/GHSA-mhww-p97m-3368
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-11400'
  - url: 'https://aws.amazon.com/security/security-bulletins/2026-039-aws'
  - url: 'https://github.com/aws/aws-advanced-jdbc-wrapper/releases/tag/4.0.1'
  - url: 'https://www.cve.org/cverecord?id=CVE-2026-11400'
  - url: 'https://github.com/advisories/GHSA-mhww-p97m-3368'
tags:
  - ghsa
  - maven
epss: 0.00305
epssPercentile: 0.20718
ingestedAt: '2026-07-17T19:14:48.474Z'
---

## Overview

Aurora PostgreSQL is a fully managed relational database engine that's compatible with PostgreSQL.

The team has identified CVE-2026-11400, an issue in Aurora PostgreSQL using the AWS Advanced JDBC Wrapper


Impact
An issue in AWS Wrappers for Amazon Aurora PostgreSQL will allow for privilege escalation to rds_superuser role. A low privilege authenticated user can create a crafted function that could be executed with permissions of other Amazon Relational Database Service (RDS) users.

Impacted versions: AWS Advanced JDBC Wrapper >= 3.0.0 and  < 4.0.1

Patches
This issue has been addressed in AWS JDBC Wrapper v4.0.1. It is recommended to upgrade to the latest version and ensuring any forked or derivative code is patched to incorporate the new fixes. 

Workarounds
Remove the public schema from the search path.

Resources
If there are any questions or comments about this advisory, contact [AWS/Amazon] Security via [vulnerability reporting page](https://aws.amazon.com/security/vulnerability-reporting) or directly via email to [aws-security@amazon.com](mailto:aws-security@amazon.com). Please do not create a public GitHub issue.

Acknowledgement 

AWS-JDBC Wrapper would like to thank [x.com/ph0smet](http://x.com/ph0smet) for collaborating on this issue through the coordinated vulnerability disclosure process.

## Affected packages

- `software.amazon.jdbc:aws-advanced-jdbc-wrapper >= 3.0.0, < 4.0.1`

## Remediation

Upgrade to a patched release:

- `software.amazon.jdbc:aws-advanced-jdbc-wrapper 4.0.1`