CVE-2026-35337: Apache Storm Deserialization Of Untrusted Data Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-jf89-3q6q-vcgr
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CVSS 8.8
CWE-502
Published
Advisory Summary

CVE-2026-35337 is a HIGH (CVSS 8.8) deserialization of untrusted data vulnerability vulnerability (CWE-502: Deserialization of Untrusted Data) affecting Apache Storm libraries in the Maven ecosystem. The issue involves deserialization of untrusted data vulnerability. Remediation is available by upgrading affected packages to version 2.8.6.

CVE-2026-35337 at a Glance

CVE Identifier CVE-2026-35337
GHSA Identifier GHSA-jf89-3q6q-vcgr
Severity HIGH
CVSS v3.1 Base Score 8.8
CWE Classification CWE-502: Deserialization of Untrusted Data
Affected Product Apache Storm
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 8.8

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2026-35337

To remediate this vulnerability, upgrade all affected Apache Storm dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

org.apache.storm:storm-client fixed: 2.8.6 
<dependency>
    <groupId>org.apache.storm</groupId>
    <artifactId>storm-client</artifactId>
    <version>2.8.6</version>
</dependency>
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree -Dincludes=org.apache.storm

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2026-35337, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=org.apache.storm

Analyze the terminal output to locate any version of Apache Storm in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.8.6), your application is affected.

Note: The mvn dependency:tree -Dincludes=org.apache.storm command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-502: Deserialization of Untrusted Data, where the product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid. In Apache Storm, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

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.

CVE-2026-35337 Affected Apache Storm Versions

1 component(s)
Fixed Versions:
2.8.6
Product / Package Ecosystem Affected Versions Fixed Version
org.apache.storm:storm-client
maven/org.apache.storm/storm-client
Maven
< 2.8.6
2.8.6

References

NVD — CVE-2026-35337 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-35337
Apache Storm Source Repository REPOSITORY
https://github.com/apache/storm
storm.apache.org/2026/04/12/storm286... WEB
https://storm.apache.org/2026/04/12/storm286-released.html
Apache Storm Security Information SECURITY
http://www.openwall.com/lists/oss-security/2026/04/12/6

Frequently Asked Questions

What is CVE-2026-35337?
CVE-2026-35337 is a security vulnerability in Apache Storm involving Deserialization of Untrusted Data vulnerability under CWE-502: Deserialization of Untrusted Data.
Which Apache Storm versions are affected?
Affected versions include releases prior to 2.8.6 across affected packages: org.apache.storm:storm-client.
What version fixes CVE-2026-35337?
Upgrading to 2.8.6 (or the latest patched release for your respective branch) resolves the vulnerability.
Is storm-client affected?
Yes, org.apache.storm:storm-client is affected in releases prior to 2.8.6. Upgrade your dependency to 2.8.6 or later.
What is the CVSS score of CVE-2026-35337?
CVE-2026-35337 has a CVSS v3.1 base score of 8.8 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2026-35337?
CVE-2026-35337 is classified under CWE-502: Deserialization of Untrusted Data (The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.).
How can I check Maven dependencies for CVE-2026-35337?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=org.apache.storm'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
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  "schema_version" : "1.4.0",
  "id" : "GHSA-jf89-3q6q-vcgr",
  "modified" : "2026-04-14T22:51:32Z",
  "published" : "2026-04-13T12:31:15Z",
  "aliases" : [ "CVE-2026-35337" ],
  "summary" : "Apache Storm: Deserialization of Untrusted Data vulnerability",
  "details" : "Deserialization of Untrusted Data vulnerability in Apache Storm.\n\nVersions Affected:\nbefore 2.8.6.\n\n\nDescription:\nWhen 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.\n\n\nMitigation:\n2.x users should upgrade to 2.8.6.\n\n\nUsers 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.\n\nCredit: This issue was discovered by K.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
  } ],
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    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
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      }, {
        "fixed" : "2.8.6"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-35337"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/apache/storm"
  }, {
    "type" : "WEB",
    "url" : "https://storm.apache.org/2026/04/12/storm286-released.html"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2026/04/12/6"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-502" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-04-14T22:51:32Z",
    "nvd_published_at" : "2026-04-13T10:16:11Z"
  }
}