CVE-2026-41720 PUBLISHED

Authentication Bypass with Empty Password in Spring LDAP

Assigner: vmware
Reserved: 22.04.2026 Published: 09.06.2026 Updated: 09.06.2026

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.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
CVSS Score: 7.4

Attack Vector	Network	Scope	Unchanged
Attack Complexity	High	Confidentiality Impact	High
Privileges Required	None	Integrity Impact	High
User Interaction	None	Availability Impact	None

CVSS 3.1

Product Status

Vendor	Spring
Product	Spring LDAP
Versions	Default: unaffected affected from 2.4.0 to 2.4.5 (excl.) affected from 3.2.0 to 3.2.18 (excl.) affected from 3.3.0 to 3.3.8 (excl.) affected from 4.0.0 to 4.0.4 (excl.)

References

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

Problem Types

CWE-287: Improper Authentication CWE

Impacts

An attacker with a valid username and an empty password can bypass password verification on LDAP servers that permit unauthenticated binds, gaining unauthorized access.