Vulnerabilities in pkg:maven/org.apache.storm/storm-client

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Advisory Identifier: GHSA-j2q8-xx3q-8fqh
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Advisory Summary

CVE-2026-41081 is a MODERATE (CVSS 6.5) apache storm's improper handling of vulnerability (CWE-287: Improper Authentication) affecting Storm client libraries in the Maven ecosystem. The issue involves apache storm's improper handling of tls client authentication failure leads to anonymous principal assignment. Remediation is available by upgrading affected packages to version 2.8.7.

2 Known Advisory Record(s)
Package Vulnerability Intelligence

pkg:maven/org.apache.storm/storm-client

2 Known Advisory Record(s)

Vulnerability advisories affecting package pkg:maven/org.apache.storm/storm-client. Select an advisory below to view technical details or fixes.

Advisory ID CVE / NVD Severity Summary
GHSA-j2q8-xx3q-8fqh CVE-2026-41081 MODERATE Apache Storm's Improper Handling of TLS Client Authentication Failure Leads to Anonymous Principal Assignment
GHSA-jf89-3q6q-vcgr CVE-2026-35337 HIGH Apache Storm: Deserialization of Untrusted Data vulnerability

CVE-2026-41081 at a Glance

CVE Identifier CVE-2026-41081
GHSA Identifier GHSA-j2q8-xx3q-8fqh
Severity MODERATE
CVSS v3.1 Base Score 6.5
CWE Classification CWE-287: Improper Authentication
Affected Product Storm client
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 6.5

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

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

How to Fix CVE-2026-41081

To remediate this vulnerability, upgrade all affected Storm client 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: 2.8.7 
<dependency>
    <groupId>org.apache.storm</groupId>
    <artifactId>storm-client</artifactId>
    <version>2.8.7</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-2026-41081, 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 Storm client in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.8.7), 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-287: Improper Authentication, where when an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. In Storm client, 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

Improper Handling of TLS Client Authentication Failure Leading to Anonymous Principal Assignment in Apache Storm Versions Affected: up to 2.8.7 Description: When TLS transport is enabled in Apache Storm without requiring client certificate authentication (the default configuration), the TlsTransportPlugin assigns a fallback principal (CN=ANONYMOUS) if no client certificate is presented or if certificate verification fails. The underlying SSLPeerUnverifiedException is caught and suppressed rather than rejecting the connection. This fail-open behavior means an unauthenticated client can establish a TLS connection and receive a valid principal identity. If the configured authorizer (e.g., SimpleACLAuthorizer) does not explicitly deny access to CN=ANONYMOUS, this may result in unauthorized access to Storm services. The condition is logged at debug level only, reducing visibility in production. Impact: Unauthenticated clients may be assigned a principal identity, potentially bypassing authorization in permissive or misconfigured environments. Mitigation: Users should upgrade to 2.8.7 in which TLS authentication failures are handled in a fail-closed manner. Users who cannot upgrade immediately should: - Enable mandatory client certificate authentication (nimbus.thrift.tls.client.auth.required: true) - Ensure authorization rules explicitly deny access to CN=ANONYMOUS - Review all ACL configurations for implicit default-allow behavior

CVE-2026-41081 Affected Storm client Versions

1 component(s)
Fixed Versions:
2.8.7
Product / Package Ecosystem Affected Versions Fixed Version
org.apache.storm:storm-client
maven/org.apache.storm/storm-client
Maven
< 2.8.7
2.8.7

References

NVD — CVE-2026-41081 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-41081
Storm client Source Repository REPOSITORY
https://github.com/apache/storm
lists.apache.org/thread/plxx5l29dvpl... WEB
https://lists.apache.org/thread/plxx5l29dvplk5rwzdcq53rdfl6v4gs8
Storm client Security Information SECURITY
http://www.openwall.com/lists/oss-security/2026/04/25/3

Frequently Asked Questions

What is CVE-2026-41081?
CVE-2026-41081 is a security vulnerability in Storm client involving Apache Storm's Improper Handling of TLS Client Authentication Failure Leads to Anonymous Principal Assignment under CWE-287: Improper Authentication.
Which Storm client versions are affected?
Affected versions include releases prior to 2.8.7 across affected packages: org.apache.storm:storm-client.
What version fixes CVE-2026-41081?
Upgrading to 2.8.7 (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 2.8.7. Upgrade your dependency to 2.8.7 or later.
What is the CVSS score of CVE-2026-41081?
CVE-2026-41081 has a CVSS v3.1 base score of 6.5 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.
What CWE is associated with CVE-2026-41081?
CVE-2026-41081 is classified under CWE-287: Improper Authentication (When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.).
How can I check Maven dependencies for CVE-2026-41081?
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 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-j2q8-xx3q-8fqh",
  "modified" : "2026-05-05T22:06:26Z",
  "published" : "2026-04-27T15:30:52Z",
  "aliases" : [ "CVE-2026-41081" ],
  "summary" : "Apache Storm's Improper Handling of TLS Client Authentication Failure Leads to Anonymous Principal Assignment",
  "details" : "Improper Handling of TLS Client Authentication Failure Leading to Anonymous Principal Assignment in Apache Storm\n\nVersions Affected: up to 2.8.7\n\nDescription: When TLS transport is enabled in Apache Storm without requiring client certificate authentication (the default configuration), the TlsTransportPlugin assigns a fallback principal (CN=ANONYMOUS) if no client certificate is presented or if certificate verification fails. The underlying SSLPeerUnverifiedException is caught and suppressed rather than rejecting the connection.\n\nThis fail-open behavior means an unauthenticated client can establish a TLS connection and receive a valid principal identity. If the configured authorizer (e.g., SimpleACLAuthorizer) does not explicitly deny access to CN=ANONYMOUS, this may result in unauthorized access to Storm services. The condition is logged at debug level only, reducing visibility in production.\n\nImpact: Unauthenticated clients may be assigned a principal identity, potentially bypassing authorization in permissive or misconfigured environments.\n\nMitigation: Users should upgrade to 2.8.7 in which TLS authentication failures are handled in a fail-closed manner.\n\nUsers who cannot upgrade immediately should:\n- Enable mandatory client certificate authentication (nimbus.thrift.tls.client.auth.required: true)\n- Ensure authorization rules explicitly deny access to CN=ANONYMOUS\n- Review all ACL configurations for implicit default-allow behavior",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.apache.storm:storm-client"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.8.7"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-41081"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/apache/storm"
  }, {
    "type" : "WEB",
    "url" : "https://lists.apache.org/thread/plxx5l29dvplk5rwzdcq53rdfl6v4gs8"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2026/04/25/3"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-287" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-05-05T22:06:26Z",
    "nvd_published_at" : "2026-04-27T14:16:48Z"
  }
}