CVE-2026-59270: Spring Security's embedded UnboundID LDAP server (UnboundIdContainer) unconditionally registers an administrat

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CRITICAL 9.4REMOTEUPGRADE

CVE-2026-59270 is a critical-severity flaw (CVSS 9.4) affecting spring security. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.4 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 66%)
CISA exploited list	No
Weakness	CWE-863
Published	2026-08-27
Last modified	2026-09-01

Publisher (CNA): VMware · Vendor: vmware

Last updated 2026-09-01 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-08-27 06:17 UTCPublished CVE record published
2026-09-01 20:36 UTCUpdated Record last modified

vmware spring security UPGRADE

Affected: >= 5.7.0 and < 5.7.26 · >= 5.8.0 and < 5.8.28 · >= 6.4.0 and < 6.4.19 · >= 6.5.0 and < 6.5.12 · >= 7.0.0 and < 7.0.6.1 · >= 7.1.0 and < 7.1.0.1

Fixed in: 5.7.26, 5.8.28, 6.4.19, 6.5.12, 7.0.6.1, 7.1.0.1

Safe to downgrade to: a release before 5.7.0

1. Check installed version

apt-cache policy spring-security || rpm -q spring-security || spring-security --version

2. UPGRADE to 5.7.26 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade spring-security

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade spring-security

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 5.7.0 (Debian / Ubuntu)

apt-cache madison spring-security sudo apt install spring-security=<VERSION_BEFORE_5.7.0> sudo apt-mark hold spring-security

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list spring-security sudo dnf downgrade spring-security-<VERSION_BEFORE_5.7.0> sudo dnf versionlock add spring-security

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Advisories and coverage

Official advisories

Spring Security Advisories: cve-2026-59270 - CRITICAL - Spring Security embedded UnboundID LDAP server exposes well-known administrative bind DN on all network interfac 2026-08-20

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-59270?

spring security: upgrade to 5.7.26, 5.8.28, 6.4.19, 6.5.12, 7.0.6.1, 7.1.0.1. Exact commands for each OS are on this page.

Is CVE-2026-59270 being exploited?

CVE-2026-59270 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-59270 affect?

CVE-2026-59270 affects spring security. Severity is critical (CVSS 9.4). 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 Spr

How urgent is CVE-2026-59270?

Priority 47/100. Critical severity; Remotely exploitable, no login, no user action

Software pages

VMware vulnerabilities

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References

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