What’s Vulnerable › Vulnerabilities
CVE-2026-41720: Authentication Bypass with Empty Password in Spring LDAP
- Severity: high (CVSS 7.4 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-06-09 · updated 2026-07-23
- Weakness: CWE-287
Description
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 products
- Spring LDAP: from 2.4.0 before 2.4.5; from 3.2.0 before 3.2.18; from 3.3.0 before 3.3.7.1; from 4.0.0 before 4.0.3.1 — fixed in 2.4.5, 3.2.18, 3.3.7.1, 4.0.3.1
How to fix
Upgrade to a fixed version: Spring LDAP 2.4.5, 3.2.18, 3.3.7.1, 4.0.3.1. Check the vendor advisory for mitigations.
References
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