SB20260828156 - Improper Authentication in Spring LDAP

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Main Vulnerability Database SB20260828156

SB20260828156 - Improper Authentication in Spring LDAP

Published: August 28, 2026

Security Bulletin ID SB20260828156
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Improper Authentication (CVE-ID: CVE-2026-41720)

CWE-ID: CWE-287 - Improper Authentication

CVSSv4: 9.1 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to bypass password verification.

The vulnerability exists due to improper authentication in DirContextAuthenticationStrategy implementations when processing a bind request with a non-empty username and an empty or null password. A remote attacker can submit such a bind request to bypass password verification.

Exploitation depends on an LDAP server configuration that permits unauthenticated binds.


Remediation

Install update from vendor's website.

References