CVE-2026-113682
CVE-2026-113682 · Networknt light-4j 2.1.5 before 2.4.0 Authentication Bypass via Empty LDAP Password
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 9.1 · Critical · EPSS 0.6% · Fix available
- Published
- Updated
Affected products and versions
light-4j
- Versions
- ≥ 2.1.5, < 2.4.0: Affected (semver)
Update to 2.4.0
Original sources
- https://github.com/networknt/light-4j/issues/2804
- https://github.com/networknt/light-4j/pull/2805
- https://github.com/networknt/light-4j/commit/54743badb34260b76ed131d8b6a4f60210cc3673
- https://github.com/networknt/light-4j/releases/tag/2.4.0
- https://github.com/networknt/light-4j/blob/2.3.7/basic-auth/src/main/java/com/networknt/basicauth/BasicAuthHandler.java#L189-L200
- https://github.com/networknt/light-4j/blob/2.3.7/ldap-util/src/main/java/com/networknt/ldap/LdapUtil.java#L152-L173
- https://www.vulncheck.com/advisories/networknt-light-4j-2.1.5-before-2.4.0-authentication-bypass-via-empty-ldap-password
- https://nvd.nist.gov/vuln/detail/CVE-2026-113682