---
id: CVE-2026-113682
title: >-
  Networknt light-4j 2.1.5 before 2.4.0 Authentication Bypass via Empty LDAP
  Password
summary: >-
  Networknt light-4j from 2.1.5 before 2.4.0 contains an authentication bypass
  vulnerability in BasicAuthHandler that allows unauthenticated attackers to log
  in as LDAP/AD-delegated users. Attackers can send a Basic Authorization header
  wi…
severity: high
cvss: 7.4
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N'
cvssSource: cna
cwe:
  - CWE-287
vendor: networknt
product: light-4j
affected:
  - light-4j >= 2.1.5 < 2.4.0
published: '2026-10-20'
updated: '2026-10-20'
sourceUpdated: '2026-10-20T15:40:42.500Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-113682'
references:
  - url: 'https://github.com/networknt/light-4j/issues/2804'
  - url: 'https://github.com/networknt/light-4j/pull/2805'
  - url: >-
      https://github.com/networknt/light-4j/commit/54743badb34260b76ed131d8b6a4f60210cc3673
  - url: 'https://github.com/networknt/light-4j/releases/tag/2.4.0'
    label: light-4j 2.4.0 Release Notes
  - url: >-
      https://github.com/networknt/light-4j/blob/2.3.7/basic-auth/src/main/java/com/networknt/basicauth/BasicAuthHandler.java#L189-L200
  - url: >-
      https://github.com/networknt/light-4j/blob/2.3.7/ldap-util/src/main/java/com/networknt/ldap/LdapUtil.java#L152-L173
  - url: >-
      https://www.vulncheck.com/advisories/networknt-light-4j-2.1.5-before-2.4.0-authentication-bypass-via-empty-ldap-password
    label: >-
      VulnCheck Advisory: Networknt light-4j 2.1.5 before 2.4.0 Authentication
      Bypass via Empty LDAP Password
tags:
  - cve.org
ingestedAt: '2026-10-20T16:10:53.297Z'
---

## Overview

Networknt light-4j from 2.1.5 before 2.4.0 contains an authentication bypass vulnerability in BasicAuthHandler that allows unauthenticated attackers to log in as LDAP/AD-delegated users. Attackers can send a Basic Authorization header with a known username and empty password, triggering an unauthenticated LDAP bind that is accepted as successful authentication.

## Affected

- `light-4j >= 2.1.5 < 2.4.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.