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TI-2026-56837 Aliases CVE-2026-82434GHSA-6fmw-8rj9-p9pg

Apache Storm Nimbus, Apache Storm Client: Disclosure of the Topology ZooKeeper Credential to Read-Only Users and to Logs

Priority MEDIUM 43CWE-522Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Information disclosure
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-522.

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 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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00501 43rd percentileScored 2026-11-07
Fix Fixed Apache Storm Nimbus (Apache Software Foundation): 3.1.0Apache Storm Client (Apache Software Foundation): 3.1.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ApacheApache Storm Nimbus3.0.0 to before 3.1.03.1.0Patch availableCNA
ApacheApache Storm Client3.0.0 to before 3.1.03.1.0Patch availableCNA
  • Apache Storm Nimbus VendorApache Affected 3.0.0 to before 3.1.0 Fixed in 3.1.0 Patch available CNA
  • Apache Storm Client VendorApache Affected 3.0.0 to before 3.1.0 Fixed in 3.1.0 Patch available CNA

Remediation

  • Fix · CNA Apache Storm Nimbus (Apache Software Foundation) Fixed in 3.1.0
  • Fix · CNA Apache Storm Client (Apache Software Foundation) Fixed in 3.1.0

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Apache Storm Nimbus 3.1.0

    7 records Highest priority Priority MEDIUM 2 MEDIUM, 5 LOW

    Other records, highest priority first

    • TI-2026-56842 Apache Storm Nimbus: Cross-Tenant Blob Deletion and Cluster Denial of Service via Unvalidated Topology Dependency KeysPriority MEDIUM 47
    • TI-2026-56835 Apache Storm Nimbus: Blobstore Authorization Bypass via Rebalance Configuration OverridesPriority LOW 37
    • TI-2026-56830 Apache Storm Nimbus: Path Traversal as the Supervisor User via Unsanitised Blobstore Map Local NamePriority LOW 35
    Show all 7 records →
  • Release ·

    Apache Storm Client 3.1.0

    3 records Highest priority Priority MEDIUM 3 MEDIUM

    Other records, highest priority first

    • TI-2026-56834 Apache Storm Client: Authorization Bypass When nimbus.groups Is Configured Without nimbus.usersPriority MEDIUM 49
    • TI-2026-56831 Apache Storm Client: Cross-Tenant Dependency Jar Substitution via Predictable Blob KeysPriority MEDIUM 41
    Show all 3 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-82434
  2. 2026-10-03 Alias added: GHSA-6fmw-8rj9-p9pg

References

Advisory 1

  • TI-2025-18529 Apache Tomcat: Potential RCE and/or information disclosure and/or information corruption with partial PUT KEVCVSS 3.1CRITICAL 10.0
  • TI-2024-30292 Apache OFBiz: Confused controller-view authorization logic (forced browsing) KEVCVSS 3.1CRITICAL 9.8
  • TI-2024-26062 Apache OFBiz: Unauthenticated endpoint could allow execution of screen rendering code KEVCVSS 3.1CRITICAL 9.8
  • TI-2024-21190 Apache OFBiz: Path traversal leading to RCE KEVCVSS 3.1CRITICAL 9.8
  • TI-2024-18186 Apache HugeGraph-Server: Command execution in gremlin KEVCVSS 3.1CRITICAL 9.8
  • TI-2023-25106 Deserialization of untrusted data in Apache ActiveMQ KEVCVSS 3.1CRITICAL 10.0
See all 4053 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences