CVE-2026-92288: Software Security Vulnerability Vulnerability

CRITICAL
Advisory Identifier: GHSA-pxfv-p3g7-3fw3
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CVSS 9.1
CWE-1390
Published
Advisory Summary

CVE-2026-92288 is a CRITICAL (CVSS 9.1) security vulnerability vulnerability (CWE-1390: Weak Authentication) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product uses an authentication mechanism to restrict access to specific users or identities, but the mechanism does not sufficiently prove that the claimed identity is correct.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-92288 at a Glance

CVE Identifier CVE-2026-92288
GHSA Identifier GHSA-pxfv-p3g7-3fw3
Severity CRITICAL
CVSS v3.1 Base Score 9.1
CWE Classification CWE-1390: Weak Authentication
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 9.1

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:N).

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 None (A:N)

How to Fix CVE-2026-92288

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-2026-92288, 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-1390: Weak Authentication, where the product uses an authentication mechanism to restrict access to specific users or identities, but the mechanism does not sufficiently prove that the claimed identity is correct. 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

Lemonldap::NG::Portal versions from 2.20.0 before 2.21.6, from 2.22.0 before 2.23.4 for Perl allow unauthenticated OAuth2 token introspection because checkEndPointAuthenticationCredentials does not verify the client secret of a public Relying Party. checkEndPointAuthenticationCredentials() skips the secret comparison for a Relying Party marked public and still returns the authentication method deduced from the request, client_secret_basic or client_secret_post. introspection() rejects a caller only when that method is missing or none, so a request carrying a public client_id and an arbitrary or empty secret passes the endpoint's authentication check. An attacker who holds an access token and knows the client_id of any public Relying Party can confirm the token is active and read its metadata, including scope, audience, expiry and the sub claim. The sub claim is computed with the calling Relying Party's user identifier attribute, so an attacker can translate a user identifier from one Relying Party to another, defeating per-client and pseudonymous identifiers.

References

NVD — CVE-2026-92288 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-92288
gitlab.ow2.org/lemonldap-ng/lemonl... WEB
https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/releases/v2.21.6
gitlab.ow2.org/lemonldap-ng/lemonl... WEB
https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/releases/v2.23.4
gitlab.ow2.org/lemonldap-ng/lemonl... WEB
https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/work_items/3719
gitlab.ow2.org/lemonldap-ng/lemonl... WEB
https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/work_items/3721
Software Security Information SECURITY
http://www.openwall.com/lists/oss-security/2026/09/25/1

Frequently Asked Questions

What is CVE-2026-92288?
CVE-2026-92288 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-1390: Weak Authentication.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-92288?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-92288?
CVE-2026-92288 has a CVSS v3.1 base score of 9.1 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.
What CWE is associated with CVE-2026-92288?
CVE-2026-92288 is classified under CWE-1390: Weak Authentication (The product uses an authentication mechanism to restrict access to specific users or identities, but the mechanism does not sufficiently prove that the claimed identity is correct.).
How can I check Maven dependencies for CVE-2026-92288?
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-pxfv-p3g7-3fw3",
  "modified" : "2026-09-25T18:31:21Z",
  "published" : "2026-09-25T03:31:00Z",
  "aliases" : [ "CVE-2026-92288" ],
  "details" : "Lemonldap::NG::Portal versions from 2.20.0 before 2.21.6, from 2.22.0 before 2.23.4 for Perl allow unauthenticated OAuth2 token introspection because checkEndPointAuthenticationCredentials does not verify the client secret of a public Relying Party.\n\ncheckEndPointAuthenticationCredentials() skips the secret comparison for a Relying Party marked public and still returns the authentication method deduced from the request, client_secret_basic or client_secret_post. introspection() rejects a caller only when that method is missing or none, so a request carrying a public client_id and an arbitrary or empty secret passes the endpoint's authentication check.\n\nAn attacker who holds an access token and knows the client_id of any public Relying Party can confirm the token is active and read its metadata, including scope, audience, expiry and the sub claim. The sub claim is computed with the calling Relying Party's user identifier attribute, so an attacker can translate a user identifier from one Relying Party to another, defeating per-client and pseudonymous identifiers.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-92288"
  }, {
    "type" : "WEB",
    "url" : "https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/releases/v2.21.6"
  }, {
    "type" : "WEB",
    "url" : "https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/releases/v2.23.4"
  }, {
    "type" : "WEB",
    "url" : "https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/work_items/3719"
  }, {
    "type" : "WEB",
    "url" : "https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/work_items/3721"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2026/09/25/1"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-1390" ],
    "severity" : "CRITICAL",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-25T01:16:48Z"
  }
}