Description

When ZooKeeper authentication is configured, Storm deliberately retains
`storm.zookeeper.topology.auth.payload` in the topology configuration, because workers need it. Nimbus then
served that configuration verbatim to any caller holding read-only topology permissions, so a user whose
only grant was the ability to view a topology received its ZooKeeper credential.

That credential is not read-only. The cluster state implementation uses write-capable ACLs for worker
heartbeats, backpressure and error state, so a recipient can forge or remove that state for the topology
concerned. It is not a write credential on assignments.

The same advisory covers the submission client, which logged the generated payload at INFO on every
submission that generated one, and the SASL handlers, which logged it at DEBUG. The credential therefore
also reached any log aggregation or support bundle collected from the cluster.

Mitigation

Upgrade to 3.1.0, where the payload is removed from the configuration served to read-only callers and is no
longer written to logs.

Users who cannot upgrade immediately should rotate `storm.zookeeper.topology.auth.payload` for existing
topologies, review retained logs and support bundles for the value, and restrict read-only topology
permissions to trusted principals.

Credit

The ASF -- found using Claude agents to study the security of open-source projects, validated and reported by Apache Storm.

Project Subscriptions

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Advisories

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Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Mon, 14 Sep 2026 21:00:00 +0000

Type Values Removed Values Added
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 14 Sep 2026 14:30:00 +0000

Type Values Removed Values Added
Description Description When ZooKeeper authentication is configured, Storm deliberately retains `storm.zookeeper.topology.auth.payload` in the topology configuration, because workers need it. Nimbus then served that configuration verbatim to any caller holding read-only topology permissions, so a user whose only grant was the ability to view a topology received its ZooKeeper credential. That credential is not read-only. The cluster state implementation uses write-capable ACLs for worker heartbeats, backpressure and error state, so a recipient can forge or remove that state for the topology concerned. It is not a write credential on assignments. The same advisory covers the submission client, which logged the generated payload at INFO on every submission that generated one, and the SASL handlers, which logged it at DEBUG. The credential therefore also reached any log aggregation or support bundle collected from the cluster. Mitigation Upgrade to 3.1.0, where the payload is removed from the configuration served to read-only callers and is no longer written to logs. Users who cannot upgrade immediately should rotate `storm.zookeeper.topology.auth.payload` for existing topologies, review retained logs and support bundles for the value, and restrict read-only topology permissions to trusted principals. Credit The ASF -- found using Claude agents to study the security of open-source projects, validated and reported by Apache Storm.
Title Apache Storm Nimbus, Apache Storm Client: Disclosure of the Topology ZooKeeper Credential to Read-Only Users and to Logs
Weaknesses CWE-522
CWE-532
References
Metrics cvssV4_0

{'score': 10, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: apache

Published:

Updated: 2026-09-14T19:50:34.074Z

Reserved: 2026-08-29T10:28:41.032Z

Link: CVE-2026-82434

cve-icon Vulnrichment

Updated: 2026-09-14T14:13:34.520Z

cve-icon NVD

Status : Deferred

Published: 2026-09-14T15:17:10.453

Modified: 2026-09-14T20:58:48.430

Link: CVE-2026-82434

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses