CVE-2026-84179: Apache Storm credential exposure in topology API

CVE-2026-84179 · Severity: medium · CVSS 6.5 · Published 2026-09-14

Apache Storm's topology configuration API exposes sensitive cluster credentials including ZooKeeper authentication tokens and TLS keystore passwords without proper redaction. Users with read-only access to topology configuration can retrieve credentials that should only be accessible to cluster administrators, potentially enabling attackers to escalate privileges or compromise cluster security infrastructure.

Technologies: Apache Storm. Vendors: Apache.

Quick answers

Is CVE-2026-84179 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-84179 being exploited in the wild.
How severe is CVE-2026-84179?
Medium severity, with a CVSS score of 6.5, published 14 September 2026.
Which products and versions are affected?
Apache Storm before 3.1.0.
Is there a fix for CVE-2026-84179?
A patch was published on 2026-09-14: Fixed in Apache Storm 3.1.0 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-84179 attacked?
It is attacked over the network.
Am I affected by CVE-2026-84179?
Check whether you run Apache Storm at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The vulnerability exists in the getTopologyPageInfo API operation, which merges Nimbus daemon configuration with topology-specific configuration and returns the combined result without credential redaction in the topology_conf field. This merged configuration is then served verbatim by the Storm UI in the GET /api/v1/topology/{id} endpoint and related metrics endpoints. The exposed credentials include storm.zookeeper.auth.payload, Thrift/Netty/ZooKeeper TLS keystore and truststore passwords, and plugin keys containing secrets. Under SimpleACLAuthorizer, principals listed in topology.readonly.users or topology.readonly.groups can exploit this to read daemon credentials that are properly redacted by the getNimbusConf API and gated on stronger authorization checks. The attack requires read-only topology access, which is a lower privilege level than cluster administration.

Affected products

  • Apache Storm before 3.1.0

Timeline

  • 2026-09-14: disclosed: CVE-2026-84179 published
  • 2026-09-14: patched: Fixed in Apache Storm 3.1.0

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