Fluid Attacks Database

Description

Spring LDAP has Authentication Bypass with Empty Password Spring LDAP's DirContextAuthenticationStrategy implementations do not reject a bind request where a non-empty username is paired with an empty or null password.

Affected versions: Spring LDAP 2.4.0 through 2.4.4; 3.2.0 through 3.2.17; 3.3.0 through 3.3.7; 4.0.0 through 4.0.3.

Mitigation

Update Impact

Minimal update. May introduce new vulnerabilities or breaking changes.

Ecosystem	Component	Affected version	Patched versions
maven	org.springframework.ldap:spring-ldap-core	>=4.0.0 <4.0.4 \|\| >=3.3.0 <3.3.8 \|\| >=3.2.0 <=3.2.16 \|\| >=0 <=2.4.4	4.0.4, 3.3.8

Aliases

1. CVE-2026-417202. NVD-2026-417203. OSV-2026-417204. GCVE-2026-41720

References

1. https://github.com/spring-projects/spring-ldap/issues/4072. https://github.com/spring-projects/spring-ldap/commit/30b90c9fb61af87208ed051fc31349ef4d418f753. https://github.com/spring-projects/spring-ldap/commit/5cc73a6b7fb1d2bcb950c4d69221c6d192d797954. https://github.com/spring-projects/spring-ldap/commit/e2748d44bdce4f6cb4663b9b8d8462e34808f09c5. https://github.com/spring-projects/spring-ldap/releases/tag/3.3.86. https://github.com/spring-projects/spring-ldap/releases/tag/4.0.47. https://spring.io/security/cve-2026-41720

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