Authentication Bypass with Empty Password in Spring LDAP
CVE-2026-41720

7.4HIGH

Key Information:

Vendor

Spring

Status
Spring Ldap
Vendor
CVE Published:
9 June 2026

What is CVE-2026-41720?

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.

Affected Version(s)

Spring LDAP 2.4.0 < 2.4.5

Spring LDAP 3.2.0 < 3.2.18

Spring LDAP 3.3.0 < 3.3.8

References

https://spring.io/security/cve-2026-41720

CVSS V3.1

Score:
7.4
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.