CVE-2026-59270: Spring Security embedded UnboundID LDAP server exposes well-known administrative bind DN on all network interfaces

Critical 9.1 EPSS 0.4% Spring Framework / Spring Boot / Spring Cloud

Spring Security's embedded UnboundID LDAP server (UnboundIdContainer) unconditionally registers an administrative credential and binds its listener to all available network interfaces. Spring Security 7.1.0 Spring Security 7.0.0 - 7.0.6 Spring Security 6.5.0 - 6.5.11 Spring Security 6.4.0 - 6.4.18 Spring Security 5.8.0 - 5.8.27 Spring Security 5.7.0 - 5.7.25

CVE-2026-59270CVE identifier
9.1CVSS 3.1 base score (critical)
0.4%EPSS: chance of exploitation in the next 30 days (higher than 35% of CVEs)
2026-08-27published

What do these terms mean? CVE · CVSS score · exploited (KEV) · EPSS · backported fix · all terms

What to do now

Check whether you run Spring Framework / Spring Boot / Spring Cloud and which version (commands below).
Install the fixed version for your system: see “Patch it” below.
Rebuild and redeploy the application with the fixed Spring dependency, then restart it

Affected and fixed versions

Affected:

Spring Spring Security 7.1.0
Spring Spring Security 7.0.0 to 7.0.6
Spring Spring Security 6.5.0 to 6.5.11
Spring Spring Security 6.4.0 to 6.4.18
Spring Spring Security 5.8.0 to 5.8.27
Spring Spring Security 5.7.0 to 5.7.25

Patch it

Use the commands for your system. Distribution packages often keep an older version number with the fix backported, so compare with the fixed package versions in the table below, not only with the upstream version.

Debian

bundled in applications: rebuild with the fixed Spring version

Ubuntu

bundled in applications

RHEL, AlmaLinux, Rocky, Oracle

bundled in applications

Fedora

bundled in applications

SUSE / openSUSE

bundled in applications

Amazon Linux

bundled in applications

Arch Linux

bundled in applications

Alpine

bundled in applications

FreeBSD

bundled in applications

General update steps for every system are on the Linux and Unix & BSD pages; after updating, see which services to restart.

Sources

Page generated automatically from official sources on 2026-11-03 18:05 UTC. Always confirm with your vendor's advisory.