High 7.4Published Oct 20, 2026

CVE-2026-113682Networknt light-4j 2.1.5 before 2.4.0 Authentication Bypass via Empty LDAP Password

Updated under an hour ago (Oct 28, 2026, 9:10 AM ET)

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It affects networknt light-4j. Add what you run to find out whether that includes you.

EPSS puts the chance of exploitation in the next 30 days at 0.56%, higher than 47% of scored CVEs.

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Every CVE for networknt light-4j

Exploited in the last 30 days

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: 7.4 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Weakness (CWE): CWE-287
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): 0.56% (percentile 47)
Assigned by: VulnCheck
NVD analysis: Deferred
Record last updated: Oct 23, 2026
First seen by InfoSec Signals: Oct 20, 2026

Affected products

Affected products

networknt light-4j networknt:light_4j (from the name)	from 2.1.5 before 2.4.0	CNA record

References

References

https://github.com/networknt/light-4j/issues/2804	issue-tracking
https://github.com/networknt/light-4j/pull/2805	patch, issue-tracking
https://github.com/networknt/light-4j/commit/54743badb34260b76ed131d8b6a4f60210cc3673	patch
https://github.com/networknt/light-4j/releases/tag/2.4.0	release-notes
https://github.com/networknt/light-4j/blob/2.3.7/basic-auth/src/main/java/com/networknt/basicauth/BasicAuthHandler.java#L189-L200	technical-description
https://github.com/networknt/light-4j/blob/2.3.7/ldap-util/src/main/java/com/networknt/ldap/LdapUtil.java#L152-L173	technical-description
https://www.vulncheck.com/advisories/networknt-light-4j-2.1.5-before-2.4.0-authentication-bypass-via-empty-ldap-password	third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.