CVE-2026-8806: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-8vpf-2whm-fffj
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CWE-440
Published
Advisory Summary

CVE-2026-8806 is a HIGH security vulnerability vulnerability (CWE-440: Expected Behavior Violation) affecting Software libraries in the Maven ecosystem. The weakness occurs when a feature, api, or function does not perform according to its specification.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-8806 at a Glance

CVE Identifier CVE-2026-8806
GHSA Identifier GHSA-8vpf-2whm-fffj
Severity HIGH
CVSS v3.1 Base Score N/A
CWE Classification CWE-440: Expected Behavior Violation
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

How to Fix CVE-2026-8806

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-2026-8806, 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-440: Expected Behavior Violation, where a feature, api, or function does not perform according to its specification. 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

Expected Behavior Violation vulnerability in Mitsubishi Electric MELSEC iQ-F Series FX5-ENET/IP Ethernet Module FX5-ENET/IP all versions allows a remote attacker to cause a denial-of-service (DoS) condition in the affected product by continuously sending a large number of communication packets to the Ethernet port of the product in a short period of time, increasing the processing load of the product, preventing the internal anomaly-detection processing from being performed, and causing the communication function to stop.

References

NVD — CVE-2026-8806 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-8806
jvn.jp/vu/jvnvu97140216 WEB
https://jvn.jp/vu/JVNVU97140216
www.cisa.gov/news-events/ics-adv... WEB
https://www.cisa.gov/news-events/ics-advisories/icsa-26-169-06
www.mitsubishielectric.com/psirt/vulnerability... WEB
https://www.mitsubishielectric.com/psirt/vulnerability/pdf/2026-003_en.pdf

Frequently Asked Questions

What is CVE-2026-8806?
CVE-2026-8806 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-440: Expected Behavior Violation.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-8806?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-8806?
CVE-2026-8806 is classified under CWE-440: Expected Behavior Violation (A feature, API, or function does not perform according to its specification.).
How can I check Maven dependencies for CVE-2026-8806?
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-8vpf-2whm-fffj",
  "modified" : "2026-06-19T03:31:27Z",
  "published" : "2026-06-19T03:31:27Z",
  "aliases" : [ "CVE-2026-8806" ],
  "details" : "Expected Behavior Violation vulnerability in Mitsubishi Electric MELSEC iQ-F Series FX5-ENET/IP Ethernet Module FX5-ENET/IP all versions allows a remote attacker to cause a denial-of-service (DoS) condition in the affected product by continuously sending a large number of communication packets to the Ethernet port of the product in a short period of time, increasing the processing load of the product, preventing the internal anomaly-detection processing from being performed, and causing the communication function to stop.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/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" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-8806"
  }, {
    "type" : "WEB",
    "url" : "https://jvn.jp/vu/JVNVU97140216"
  }, {
    "type" : "WEB",
    "url" : "https://www.cisa.gov/news-events/ics-advisories/icsa-26-169-06"
  }, {
    "type" : "WEB",
    "url" : "https://www.mitsubishielectric.com/psirt/vulnerability/pdf/2026-003_en.pdf"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-440" ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-06-19T03:16:15Z"
  }
}