CVE-2026-82435: Software Security Vulnerability Vulnerability

CRITICAL
Advisory Identifier: GHSA-3mpj-29mm-p7wr
Share
CVSS 9.8
CWE-789
Published
Advisory Summary

CVE-2026-82435 is a CRITICAL (CVSS 9.8) security vulnerability vulnerability (CWE-789: Memory Allocation with Excessive Size Value) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product allocates memory based on an untrusted, large size value, but it does not ensure that the size is within expected limits, allowing arbitrary amounts of memory to be allocated.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-82435 at a Glance

CVE Identifier CVE-2026-82435
GHSA Identifier GHSA-3mpj-29mm-p7wr
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-789: Memory Allocation with Excessive Size Value
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 9.8

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:H/I:H/A:H).

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 High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2026-82435

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

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

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2026-82435, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree

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

Note: The mvn dependency:tree 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-789: Memory Allocation with Excessive Size Value, where the product allocates memory based on an untrusted, large size value, but it does not ensure that the size is within expected limits, allowing arbitrary amounts of memory to be allocated. In Software, 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

Description The worker's Netty message decoder is installed ahead of the SASL authentication handlers in the pipeline and acts on frames before any authentication has taken place. It allocated buffers sized from a length field carried in the frame, so a single frame from an unauthenticated peer able to reach a worker slot port could drive a large allocation. `storm.messaging.netty.authentication` defaults to false, and the decoder runs before the handler that enforces it in any case, so no credentials are required. The attacker needs only TCP reachability to a worker port. The effect of a single frame at the default 768 MB worker heap has not been measured to distinguish sustained worker loss from transient garbage-collection pressure. The severity assigned to this advisory reflects the more conservative reading; consumers who require a precise figure should test against their own worker heap configuration. Mitigation Upgrade to 3.1.0, where frames are decoded only after the handshake completes. Users who cannot upgrade immediately should ensure that worker slot ports are reachable only from within the cluster, as the security model already recommends, and should enable `storm.messaging.netty.authentication` where the deployment permits it. Credit The ASF -- found using Claude agents to study the security of open-source projects, validated and reported by Apache Storm.

References

NVD — CVE-2026-82435 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-82435
lists.apache.org/thread/wqfy7qb8c76f... WEB
https://lists.apache.org/thread/wqfy7qb8c76f4c3wr2w6bhoz62vcnpb7
Software Security Information SECURITY
http://www.openwall.com/lists/oss-security/2026/09/13/15

Frequently Asked Questions

What is CVE-2026-82435?
CVE-2026-82435 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-789: Memory Allocation with Excessive Size Value.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-82435?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-82435?
CVE-2026-82435 has a CVSS v3.1 base score of 9.8 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2026-82435?
CVE-2026-82435 is classified under CWE-789: Memory Allocation with Excessive Size Value (The product allocates memory based on an untrusted, large size value, but it does not ensure that the size is within expected limits, allowing arbitrary amounts of memory to be allocated.).
How can I check Maven dependencies for CVE-2026-82435?
Run the dependency tree command: 'mvn dependency:tree'. 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-3mpj-29mm-p7wr",
  "modified" : "2026-09-14T21:31:40Z",
  "published" : "2026-09-14T15:32:49Z",
  "aliases" : [ "CVE-2026-82435" ],
  "details" : "Description\n\nThe worker's Netty message decoder is installed ahead of the SASL authentication handlers in the pipeline\nand acts on frames before any authentication has taken place. It allocated buffers sized from a\nlength field carried in the frame, so a single frame from an unauthenticated peer able to reach a worker\nslot port could drive a large allocation.\n\n`storm.messaging.netty.authentication` defaults to false, and the decoder runs before the handler that\nenforces it in any case, so no credentials are required. The attacker needs only TCP reachability to a\nworker port.\n\nThe effect of a single frame at the default 768 MB worker heap has not been measured to distinguish\nsustained worker loss from transient garbage-collection pressure. The severity assigned to this advisory\nreflects the more conservative reading; consumers who require a precise figure should test against their own\nworker heap configuration.\n\nMitigation\n\nUpgrade to 3.1.0, where frames are decoded only after the handshake completes.\n\nUsers who cannot upgrade immediately should ensure that worker slot ports are reachable only from within the\ncluster, as the security model already recommends, and should enable\n`storm.messaging.netty.authentication` where the deployment permits it.\n\nCredit\n\nThe ASF -- found using Claude agents to study the security of open-source projects, validated and reported by Apache Storm.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-82435"
  }, {
    "type" : "WEB",
    "url" : "https://lists.apache.org/thread/wqfy7qb8c76f4c3wr2w6bhoz62vcnpb7"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2026/09/13/15"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-789" ],
    "severity" : "CRITICAL",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-14T15:17:10Z"
  }
}