CVE-2026-18061 AWS CVE debrief

Who should care

Defenders and administrators of systems using AWS Advanced JDBC Wrapper 3.3.0 through 4.2.0 should assess exposure and prioritize remediation to prevent potential sensitive file disclosure.

Why it matters

CVE-2026-18061 requires defenders to assess exposure and prioritize remediation to prevent potential sensitive file disclosure in AWS Advanced JDBC Wrapper 3.3.0 through 4.2.0.

• Potential disclosure of sensitive files from application hosts
• Possible exposure of stored database and IAM role credentials
• Requires verification of affected versions and remediation status
• Upgrade to version 4.3.0 or later to remediate

Technical summary

The RemoteQueryCachePlugin in AWS Advanced JDBC Wrapper 3.3.0 through 4.2.0 has an improper restriction of XML external entity references, which might allow an actor with write access to the shared cache infrastructure to disclose sensitive files from application hosts that read cached query results. This vulnerability is caused by the lack of proper validation of XML external entities, allowing attackers to potentially disclose sensitive information. To remediate this issue, users should upgrade to version 4.3.0 or later.

Defensive priority

Upgrade to version 4.3.0 or later to remediate the improper restriction of XML external entity references in the RemoteQueryCachePlugin in AWS Advanced JDBC Wrapper.

Recommended defensive actions

• Upgrade to version 4.3.0 or later
• Review and update affected systems
• Monitor for potential sensitive file disclosure
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed
• Check relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

The CVE record and NVD vulnerability detail page provide information on the improper restriction of XML external entity references in the RemoteQueryCachePlugin in AWS Advanced JDBC Wrapper 3.3.0 through 4.2.0.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.