Incorrect Implementation of Authentication Algorithm Affecting org.springframework.ldap:spring-ldap-core package, versions [2.4.0, 3.0.0)[3.2.0, 3.3.8)[4.0.0-M1, 4.0.4)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JAVA-ORGSPRINGFRAMEWORKLDAP-17260845
- published9 Jun 2026
- disclosed8 Jun 2026
- creditUnknown
Introduced: 8 Jun 2026
NewCVE-2026-41720 (opens in a new tab)How to fix?
Upgrade org.springframework.ldap:spring-ldap-core to version 3.0.0, 3.3.8, 4.0.4 or higher.
Overview
org.springframework.ldap:spring-ldap-core is a maven plugin for LDAP for Sping.
Affected versions of this package are vulnerable to Incorrect Implementation of Authentication Algorithm via LDAP authentication handling in DirContextAuthenticationStrategy implementations. An attacker can bypass password verification by authenticating with a valid username and an empty or null password when the underlying LDAP server permits unauthenticated binds. Because there is no rejection for such bind requests, authentication may succeed without proof of knowledge of the user's password.
Note:
1)This affects authentication flows using AbstractContextSource, LdapTemplate, and LdapClient.
- This is only exploitable if the target LDAP server permits unauthenticated binds as defined in RFC 4513 Section 5.1.2.