CVE-2026-113682
Networknt light-4j 2.1.5 before 2.4.0 Authentication Bypass via Empty LDAP Password
- State
- Published
- Severity
- 9.1 Critical
- Published
- Oct 20, 2026
- Updated
- Oct 23, 2026
- Reserved
- Oct 20, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 9.1 Critical | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 7.4 High | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N | VulnCheck |
Weaknesses
- CWE-287 Improper Authentication
Affected Products
| Product | Versions |
|---|---|
light-4jnetworknt |
|
References
- https://github.com/networknt/light-4j/issues/2804issue-tracking
- https://github.com/networknt/light-4j/pull/2805patchissue-tracking
- https://github.com/networknt/light-4j/commit/54743badb34260b76ed131d8b6a4f60210cc3673patch
- light-4j 2.4.0 Release Notesrelease-notes
- https://github.com/networknt/light-4j/blob/2.3.7/basic-auth/src/main/java/com/networknt/basicauth/BasicAuthHandler.java#L189-L200technical-description
- https://github.com/networknt/light-4j/blob/2.3.7/ldap-util/src/main/java/com/networknt/ldap/LdapUtil.java#L152-L173technical-description
- VulnCheck Advisory: Networknt light-4j 2.1.5 before 2.4.0 Authentication Bypass via Empty LDAP Passwordthird-party-advisory
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