---
id: CVE-2026-82434
title: >-
  Description


  When ZooKeeper authentication is configured, Storm deliberately retains

  `storm.zookeeper.topology.auth.payload` in the topology configuration, because
  workers need it
summary: >-
  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 ca…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-522
  - CWE-532
vendor: Apache Software Foundation
product: 'org.apache.storm:storm-server'
affected:
  - 'org.apache.storm:storm-server >= 3.0.0 < 3.1.0'
  - 'org.apache.storm:storm-client >= 3.0.0 < 3.1.0'
published: '2026-09-14'
updated: '2026-09-14'
sourceUpdated: '2026-09-14T20:58:48.430'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-82434'
references:
  - url: 'https://lists.apache.org/thread/1t7hggrz59rdq792qm1pnkqj0ogm2szq'
    label: security@apache.org
  - url: 'http://www.openwall.com/lists/oss-security/2026/09/13/14'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'http://www.openwall.com/lists/oss-security/2026/09/13/23'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
  - cve.org
  - score-dispute
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-14T19:50:11.381462Z'
scores:
  nvd: 6.5
  cna: 10
ingestedAt: '2026-09-14T15:23:07.424Z'
epss: 0.00501
epssPercentile: 0.40337
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.