CVE-2026-85591: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-p8fc-6wpx-fw6r
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CWE-620
Published
Advisory Summary

CVE-2026-85591 is a HIGH security vulnerability vulnerability (CWE-620: Unverified Password Change) affecting Software libraries in the Maven ecosystem. The weakness occurs when when setting a new password for a user, the product does not require knowledge of the original password, or using another form of authentication.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-85591 at a Glance

CVE Identifier CVE-2026-85591
GHSA Identifier GHSA-p8fc-6wpx-fw6r
Severity HIGH
CVSS v3.1 Base Score N/A
CWE Classification CWE-620: Unverified Password Change
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

How to Fix CVE-2026-85591

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-2026-85591, 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-620: Unverified Password Change, where when setting a new password for a user, the product does not require knowledge of the original password, or using another form of authentication. 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 contain an authentication bypass vulnerability in the user control panel API endpoint that allows authenticated attackers to change account passwords without verifying the current password. Attackers with session access can submit a PUT request to the user data update endpoint with only a CSRF token to silently change any user's password, including administrators, causing irreversible account takeover and victim lockout.

References

GitHub Advisory / Wiki ADVISORY
https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-6r2c-694w-24qv
NVD — CVE-2026-85591 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-85591
www.vulncheck.com/advisories/phpmyfaq... WEB
https://www.vulncheck.com/advisories/phpmyfaq-before-4.1.8-authentication-bypass-via-unverified-password-change

Frequently Asked Questions

What is CVE-2026-85591?
CVE-2026-85591 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-620: Unverified Password Change.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-85591?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-85591?
CVE-2026-85591 is classified under CWE-620: Unverified Password Change (When setting a new password for a user, the product does not require knowledge of the original password, or using another form of authentication.).
How can I check Maven dependencies for CVE-2026-85591?
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-p8fc-6wpx-fw6r",
  "modified" : "2026-09-04T12:30:59Z",
  "published" : "2026-09-04T12:30:59Z",
  "aliases" : [ "CVE-2026-85591" ],
  "details" : "phpMyFAQ versions before 4.1.8 contain an authentication bypass vulnerability in the user control panel API endpoint that allows authenticated attackers to change account passwords without verifying the current password. Attackers with session access can submit a PUT request to the user data update endpoint with only a CSRF token to silently change any user's password, including administrators, causing irreversible account takeover and victim lockout.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/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-6r2c-694w-24qv"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-85591"
  }, {
    "type" : "WEB",
    "url" : "https://www.vulncheck.com/advisories/phpmyfaq-before-4.1.8-authentication-bypass-via-unverified-password-change"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-620" ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-04T12:17:22Z"
  }
}