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CVE-2026-35337 — Vulnerability in org.apache.storm:storm-client —...

HIGH

Apache Storm: Deserialization of Untrusted Data vulnerability

Published April 13, 2026Updated April 14, 2026Source: osv

Summary

Deserialization of Untrusted Data vulnerability in Apache Storm. Versions Affected: before 2.8.6. Description: When processing topology credentials submitted via the Nimbus Thrift API, Storm deserializes the base64-encoded TGT blob using ObjectInputStream.readObject() without any class filtering or validation. An authenticated user with topology submission rights could supply a crafted serialized object in the "TGT" credential field, leading to remote code execution in both the Nimbus and Worker JVMs. Mitigation: 2.x users should upgrade to 2.8.6. Users who cannot upgrade immediately should monkey-patch an ObjectInputFilter allow-list to ClientAuthUtils.deserializeKerberosTicket() restricting deserialized classes to javax.security.auth.kerberos.KerberosTicket and its known dependencies. A guide on how to do this is available in the release notes of 2.8.6. Credit: This issue was discovered by K.

Advisory Timeline

  • First published April 13, 2026 (182 days ago).
  • Last revised April 14, 2026 — 1 day after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Maven
Update org.apache.storm:storm-client to 2.8.6 or later
<!-- Update pom.xml dependency version to 2.8.6 for org.apache.storm:storm-client -->

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

Affects 1 ecosystem: maven (1).

PackageEcosystemAffectedFixed In
org.apache.storm:storm-client
maven
2.0.0, 2.1.0, 2.1.1, 2.2.0 (+17 more)2.8.6

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

  • CWE-502
    Deserialization of Untrusted DataMITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 8.8 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

Frequently Asked Questions

What is CVE-2026-35337?
Apache Storm: Deserialization of Untrusted Data vulnerability This vulnerability has been assigned a severity rating of HIGH (CVSS score: 8.8/10).
How do I check if my project is affected by CVE-2026-35337?
CVE-2026-35337 affects org.apache.storm:storm-client. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2026-35337 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
8.8

High exploitability or significant impact. Prioritize remediation within days.

Also Known As

GHSA-jf89-3q6q-vcgr

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