CVE-2026-85586: Software Security Vulnerability Vulnerability

MODERATE
Advisory Identifier: GHSA-m8g2-rwh5-6gg5
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CWE-799
Published
Advisory Summary

CVE-2026-85586 is a MODERATE security vulnerability vulnerability (CWE-799: Improper Control of Interaction Frequency) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product does not properly limit the number or frequency of interactions that it has with an actor, such as the number of incoming requests.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-85586 at a Glance

CVE Identifier CVE-2026-85586
GHSA Identifier GHSA-m8g2-rwh5-6gg5
Severity MODERATE
CVSS v3.1 Base Score N/A
CWE Classification CWE-799: Improper Control of Interaction Frequency
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

How to Fix CVE-2026-85586

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-2026-85586, 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-799: Improper Control of Interaction Frequency, where the product does not properly limit the number or frequency of interactions that it has with an actor, such as the number of incoming requests. 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

phpMyFAQ versions before 4.1.8 fail to validate CAPTCHA when the store parameter is set to 'now' in question submission requests. Unauthenticated attackers can bypass CAPTCHA protection and submit unlimited questions directly, causing database pollution and triggering outgoing mail notifications.

References

GitHub Advisory / Wiki ADVISORY
https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-72vj-pvm4-mm7x
NVD — CVE-2026-85586 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-85586
www.vulncheck.com/advisories/phpmyfaq... WEB
https://www.vulncheck.com/advisories/phpmyfaq-before-4.1.8-captcha-bypass-via-store-parameter

Frequently Asked Questions

What is CVE-2026-85586?
CVE-2026-85586 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-799: Improper Control of Interaction Frequency.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-85586?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-85586?
CVE-2026-85586 is classified under CWE-799: Improper Control of Interaction Frequency (The product does not properly limit the number or frequency of interactions that it has with an actor, such as the number of incoming requests.).
How can I check Maven dependencies for CVE-2026-85586?
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-m8g2-rwh5-6gg5",
  "modified" : "2026-09-04T12:30:59Z",
  "published" : "2026-09-04T12:30:59Z",
  "aliases" : [ "CVE-2026-85586" ],
  "details" : "phpMyFAQ versions before 4.1.8 fail to validate CAPTCHA when the store parameter is set to 'now' in question submission requests. Unauthenticated attackers can bypass CAPTCHA protection and submit unlimited questions directly, causing database pollution and triggering outgoing mail notifications.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/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" : "WEB",
    "url" : "https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-72vj-pvm4-mm7x"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-85586"
  }, {
    "type" : "WEB",
    "url" : "https://www.vulncheck.com/advisories/phpmyfaq-before-4.1.8-captcha-bypass-via-store-parameter"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-799" ],
    "severity" : "MODERATE",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-04T12:17:20Z"
  }
}