Connect your agent
AdvisoriesCriticalCheck your lockfilePluginHow it worksPricing Connect your agent

Advisory record · GHSA-6g32-pxv4-2wfj

RabbitMQ Java client: Unvalidated Class.forName in JSON-RPC ProcedureDescription enables arbitrary class loading

CVSS 7.5 HighEPSS 0.0056 · 46th percentile

Published by the GitHub Advisory Database at 18 Aug 2026, 16:32 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
com.rabbitmq:amqp-clientMaven<5.33.05.33.0
Identifiers
GHSA-6g32-pxv4-2wfj · CVE-2026-63337
Weakness (CWE)
CWE-470
Tags
Published
18 Aug 2026
Updated
10 Sept 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

The RabbitMQ Java client (com.rabbitmq:amqp-client) versions before 5.33.0 are affected. The JSON-RPC tools load classes by name from service descriptions received over AMQP without validation, so an attacker who can intercept or answer the describe request, such as a co-tenant on a shared broker or a man-in-the-middle, can cause arbitrary classes to load and run their static initializers in the client's JVM. Upgrade to amqp-client 5.33.0 or later. The source gives no workaround.

Written 2 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
7.5 High 4.0 CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0056, the 46th percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:16 UTC First seen by agentprime
  2. 31 Oct 2026, 14:16 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.