Vulnerability · Published Sep 11, 2026 · Assigned by AMZN

CVE-2026-18061Improper Restriction of XML External Entity References in AWS Advanced JDBC Wrapper RemoteQueryCachePlugin

Medium 5.9

In plain English

A medium-severity XML external entity in AWS Advanced JDBC Wrapper from AWS. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities).

Severity (CVSS 3.1)5.9Medium

Exploit odds (30 days)0.5%top 60.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Improper restriction of XML external entity references in the RemoteQueryCachePlugin in AWS Advanced JDBC Wrapper 3.3.0 through 4.2.0 might allow an actor with write access to the shared cache infrastructure to disclose sensitive files from application hosts that read cached query results, including stored database and IAM role credentials, via crafted XML data in a cached column value. To remediate this issue, users should upgrade to version 4.3.0 or later.

Affected products (as reported)

Vendor	Product	Versions
AWS	AWS Advanced JDBC Wrapper	3.3.0 – through 4.2.0

Weakness: CWE-611 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:L

References

https://github.com/aws/aws-advanced-jdbc-wrapper/releases/tag/4.3.0 patch
https://aws.amazon.com/security/security-bulletins/2026-109-aws/ vendor-advisory
https://github.com/aws/aws-advanced-jdbc-wrapper/security/advisories/GHSA-fpvp-qwgm-v6h9 third-party-advisory