CVE-2026-41720 | BDVDB-2026-338948 Detail

SpringSpring LDAP

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.

Impact#

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

Weaknesses#

CWE-287 Improper Authentication

References#

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

Exploit#

No public exploit known

History#

Version 12026-06-09Record published in the CVE List.
Version 22026-06-23Most recent update recorded in the CVE List.

Published

Published: 2026-06-09
Last modified: 2026-06-23

Vendor information

Vendor: Spring
Product: Spring LDAP

All Spring vulnerabilities

Score

7.4 High

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 17.4.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Authentication Issues

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
>= 2.4.0 and < 2.4.5
Fixed
2.4.5
Vulnerable
>= 3.2.0 and < 3.2.18
Fixed
3.2.18
Vulnerable
>= 3.3.0 and < 3.3.7.1
Fixed
3.3.7.1
Vulnerable
>= 4.0.0 and < 4.0.3.1
Fixed
4.0.3.1

Scoring System

CVSS v4.0

Not available

CVSS v3.1

7.4 High

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

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

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).