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Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection') Affecting druid package, versions <37.0.0-r54

Severity

 Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.32% (25th percentile)

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  • Snyk IDSNYK-WOLFILATEST-DRUID-19012530
  • published20 Aug 2026
  • disclosed18 Aug 2026
Report a new vulnerability Found a mistake?

Introduced: 18 Aug 2026

NewCVE-2026-63337  (opens in a new tab)
CWE-470  (opens in a new tab)

How to fix?

Upgrade Wolfi druid to version 37.0.0-r54 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream druid package and not the druid package as distributed by Wolfi. See How to fix? for Wolfi relevant fixed versions and status.

The RabbitMQ Java client library allows Java and JVM-based applications to connect to and interact with RabbitMQ nodes. Prior to 5.33.0, com.rabbitmq.tools.jsonrpc.ProcedureDescription receives a javaReturnType value in an untrusted system.describe response and passes it through JSONUtil.tryFill, setJavaReturnType, and computeReturnTypeAsJavaClass to Class.forName(javaReturnType) with initialization enabled. An attacker able to answer the JsonRpcClient request through a shared broker or network interception can select a class already present in the victim JVM and trigger its static initializer, while JsonRpcClient.java later passes getReturnType output to mapper.parse and may also create type confusion. Successful exploitation can affect confidentiality, integrity, and availability in the client process. This issue is fixed in version 5.33.0.