CVE-2026-11400

highCVSS 8covered by 2 sourcesfirst seen 2026-07-17

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 or directly via email to aws-security@amazon.com. Please do not create a public GitHub issue. Acknowledgement AWS-JDBC Wrapper would like to thank x.com/ph0smet for collaborating on this issue through the coordinated vulnerability disclosure process.

CSIRTS triage

vendor: AWS product: Amazon Aurora PostgreSQL Privilege escalationaffected: AWS Advanced JDBC Wrapper >=3.0.0 and < 4.0.1; AWS Advanced Go Wrapper release 2026-04-06

What: Privilege escalation to rds_superuser role can occur via crafted functions.
Who is affected: Low privilege authenticated users of Amazon Aurora PostgreSQL.
Urgency: Remediation is necessary to prevent privilege escalation.
Action: Update to the latest versions of the AWS Advanced JDBC and Go Wrappers.

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Exploitation outlook

Low exploitation risk0.30% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 23% of all EPSS-scored CVEs.

Advisory coverage (2)

lowCVE-2026-11400 and CVE-2026-11401aws · 2026-08-20
highGHSA-mhww-p97m-3368: AWS-JDBC Wrapper: Privilege Escalation in Aurora PostgreSQL instanceghsa · 2026-07-17

External references

NVD record for CVE-2026-11400

CVE.org record

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