CVE-2026-82439: Software Security Vulnerability Vulnerability

CRITICAL
Advisory Identifier: GHSA-q5hq-8q75-r6f6
Share
CVSS 9.8
CWE-770
Published
Advisory Summary

CVE-2026-82439 is a CRITICAL (CVSS 9.8) security vulnerability vulnerability (CWE-770: Allocation of Resources Without Limits or Throttling) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-82439 at a Glance

CVE Identifier CVE-2026-82439
GHSA Identifier GHSA-q5hq-8q75-r6f6
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-770: Allocation of Resources Without Limits or Throttling
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-2026-82439

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-2026-82439, 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-770: Allocation of Resources Without Limits or Throttling, where the product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can 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 DRPC server kept a map from function name to request queue and created an entry the first time a function name was seen. No code path ever removed an entry: request cleanup removed the request from its queue, and the shutdown path drained queues, but the queue object and its map entry remained for the life of the process. Function names come from the client and are not constrained to functions any topology has registered, so the number of retained entries is bounded only by the number of distinct names an attacker chooses to send, and each retained entry holds the name itself. `drpc.authorizer` is unset by default, so no credentials are required to reach the endpoint. The retained state is permanent rather than a transient load spike, so the effect accumulates until the DRPC server exhausts its heap. Mitigation Upgrade to 3.1.0, where a function's queue is removed once nothing is waiting in it. Users who cannot upgrade immediately should configure `drpc.authorizer` so that only trusted principals can reach the DRPC endpoints, and should ensure the DRPC ports are not reachable from untrusted networks. Credit The ASF -- found using Claude agents to study the security of open-source projects, validated and reported by Apache Storm.

References

NVD — CVE-2026-82439 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-82439
lists.apache.org/thread/7sgzvv5lzz93... WEB
https://lists.apache.org/thread/7sgzvv5lzz93jn6vy74qfk105bhmkrzs
Software Security Information SECURITY
http://www.openwall.com/lists/oss-security/2026/09/13/18

Frequently Asked Questions

What is CVE-2026-82439?
CVE-2026-82439 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-770: Allocation of Resources Without Limits or Throttling.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-82439?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-82439?
CVE-2026-82439 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-2026-82439?
CVE-2026-82439 is classified under CWE-770: Allocation of Resources Without Limits or Throttling (The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.).
How can I check Maven dependencies for CVE-2026-82439?
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-q5hq-8q75-r6f6",
  "modified" : "2026-09-14T21:31:37Z",
  "published" : "2026-09-14T15:32:46Z",
  "aliases" : [ "CVE-2026-82439" ],
  "details" : "Description\n\nThe DRPC server kept a map from function name to request queue and created an entry the first time a\nfunction name was seen. No code path ever removed an entry: request cleanup removed the request from its\nqueue, and the shutdown path drained queues, but the queue object and its map entry remained for the life of\nthe process.\n\nFunction names come from the client and are not constrained to functions any topology has registered, so the\nnumber of retained entries is bounded only by the number of distinct names an attacker chooses to send, and\neach retained entry holds the name itself. `drpc.authorizer` is unset by default, so no credentials are\nrequired to reach the endpoint.\n\nThe retained state is permanent rather than a transient load spike, so the effect accumulates until the DRPC\nserver exhausts its heap.\n\nMitigation\n\nUpgrade to 3.1.0, where a function's queue is removed once nothing is waiting in it.\n\nUsers who cannot upgrade immediately should configure `drpc.authorizer` so that only trusted principals can\nreach the DRPC endpoints, and should ensure the DRPC ports are not reachable from untrusted networks.\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-2026-82439"
  }, {
    "type" : "WEB",
    "url" : "https://lists.apache.org/thread/7sgzvv5lzz93jn6vy74qfk105bhmkrzs"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2026/09/13/18"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-770" ],
    "severity" : "CRITICAL",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-14T14:17:12Z"
  }
}