High severity · published Jun 9, 2026
CVE-2026-41720
Authentication Bypass with Empty Password in Spring LDAP
7.4
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 17% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SL
Spring LDAP · Spring
2.4.0 before 2.4.5; 3.2.0 before 3.2.18; 3.3.0 before 3.3.7.1; 4.0.0 before 4.0.3.1 · source: vendor