CVE-2026-41720: Spring LDAP

High severity, CVSS 7.4. EPSS: 0.4% chance of exploitation in the next 30 days.

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 Spring LDAP: from 2.4.0, before 2.4.5 (fixed in 2.4.5); from 3.2.0, before 3.2.18 (fixed in 3.2.18); from 3.3.0, before 3.3.7.1 (fixed in 3.3.7.1); from 4.0.0, before 4.0.3.1 (fixed in 4.0.3.1)

Published 2026-06-09. Last modified 2026-07-23.