CVE-2026-18582: Software Security Vulnerability Vulnerability

MODERATE
Advisory Identifier: GHSA-vj8r-wqrg-59qf
Share
CVSS 5.3
CWE-590
Published
Advisory Summary

CVE-2026-18582 is a MODERATE (CVSS 5.3) security vulnerability vulnerability (CWE-590: Free of Memory not on the Heap) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product calls free() on a pointer to memory that was not allocated using associated heap allocation functions such as malloc(), calloc(), or realloc().. Remediation is available in the latest vendor maintenance releases.

CVE-2026-18582 at a Glance

CVE Identifier CVE-2026-18582
GHSA Identifier GHSA-vj8r-wqrg-59qf
Severity MODERATE
CVSS v3.1 Base Score 5.3
CWE Classification CWE-590: Free of Memory not on the Heap
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 5.3

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:N/I:N/A:L).

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 None (C:N)
Integrity None (I:N)
Availability Low (A:L)

How to Fix CVE-2026-18582

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-2026-18582, 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-590: Free of Memory not on the Heap, where the product calls free() on a pointer to memory that was not allocated using associated heap allocation functions such as malloc(), calloc(), or realloc(). 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

A security flaw has been discovered in mz-automation libiec61850 up to 1.6.1. This vulnerability affects the function Reporting_RCBWriteAccessHandler of the file src/iec61850/server/mms_mapping/reporting.c of the component Report Sending Path Handler. The manipulation results in free of memory not on the heap. It is possible to launch the attack remotely. The exploit has been released to the public and may be used for attacks. Upgrading to version 1.6.2 is able to resolve this issue. The patch is identified as 5b2a69f44256b8548927d8afdd7ac5f5381abe1e. It is suggested to upgrade the affected component. The vendor was contacted early about this disclosure.

References

GitHub Advisory / Wiki ADVISORY
https://github.com/mz-automation/libiec61850/security/advisories/GHSA-7qg8-hm25-rv5v
NVD — CVE-2026-18582 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-18582
Software Source Repository REPOSITORY
https://github.com/gff-cw/information/issues/2
Security Fix Commit FIX COMMIT
https://github.com/mz-automation/libiec61850/commit/5b2a69f44256b8548927d8afdd7ac5f5381abe1e
Software Source Repository REPOSITORY
https://github.com/mz-automation/libiec61850
Software Release RELEASE
https://github.com/mz-automation/libiec61850/releases/tag/v1.6.2
vuldb.com/cve/cve-2026-18582 WEB
https://vuldb.com/cve/CVE-2026-18582
vuldb.com/submit/844920 WEB
https://vuldb.com/submit/844920
vuldb.com/vuln/385411 WEB
https://vuldb.com/vuln/385411
vuldb.com/vuln/385411/cti WEB
https://vuldb.com/vuln/385411/cti

Frequently Asked Questions

What is CVE-2026-18582?
CVE-2026-18582 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-590: Free of Memory not on the Heap.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-18582?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-18582?
CVE-2026-18582 has a CVSS v3.1 base score of 5.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
What CWE is associated with CVE-2026-18582?
CVE-2026-18582 is classified under CWE-590: Free of Memory not on the Heap (The product calls free() on a pointer to memory that was not allocated using associated heap allocation functions such as malloc(), calloc(), or realloc().).
How can I check Maven dependencies for CVE-2026-18582?
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-vj8r-wqrg-59qf",
  "modified" : "2026-08-03T03:31:56Z",
  "published" : "2026-08-03T03:31:56Z",
  "aliases" : [ "CVE-2026-18582" ],
  "details" : "A security flaw has been discovered in mz-automation libiec61850 up to 1.6.1. This vulnerability affects the function Reporting_RCBWriteAccessHandler of the file src/iec61850/server/mms_mapping/reporting.c of the component Report Sending Path Handler. The manipulation results in free of memory not on the heap. It is possible to launch the attack remotely. The exploit has been released to the public and may be used for attacks. Upgrading to version 1.6.2 is able to resolve this issue. The patch is identified as 5b2a69f44256b8548927d8afdd7ac5f5381abe1e. It is suggested to upgrade the affected component. The vendor was contacted early about this disclosure.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/mz-automation/libiec61850/security/advisories/GHSA-7qg8-hm25-rv5v"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-18582"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/gff-cw/information/issues/2"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/mz-automation/libiec61850/commit/5b2a69f44256b8548927d8afdd7ac5f5381abe1e"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/mz-automation/libiec61850"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/mz-automation/libiec61850/releases/tag/v1.6.2"
  }, {
    "type" : "WEB",
    "url" : "https://vuldb.com/cve/CVE-2026-18582"
  }, {
    "type" : "WEB",
    "url" : "https://vuldb.com/submit/844920"
  }, {
    "type" : "WEB",
    "url" : "https://vuldb.com/vuln/385411"
  }, {
    "type" : "WEB",
    "url" : "https://vuldb.com/vuln/385411/cti"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-590" ],
    "severity" : "MODERATE",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-08-03T02:16:29Z"
  }
}