Improper access control in Spring Security - CVE-2026-59270
Published: August 31, 2026
Vulnerability identifier: #VU146378
CSH Severity: High
CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-59270
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to read or modify entries in the in-memory directory.
The vulnerability exists due to improper access control in UnboundIdContainer when the embedded LDAP server binds its listener to all available network interfaces and registers a well-known administrative bind DN. A remote attacker can authenticate to the LDAP listener using the well-known administrative bind DN to read or modify entries in the in-memory directory.
The application must use UnboundIdContainer, either directly or through Spring Boot auto-configuration, and the LDAP listener port must be reachable from the attacker's network position.
Affected software
Spring Security
Library Support for Spring
Library Support for Spring
How to mitigate CVE-2026-59270
Install security update from vendor's website.
Spring Security - addressed in versions 5.7.26, 5.8.28, 6.4.19, 6.5.12, 7.0.6.1, 7.0.7, 7.1.0.1, 7.1.1
Library Support for Spring - update to 3.5.19
Library Support for Spring - update to 3.5.19