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CVE-2026-59354: In versions of Spring Security's OAuth2 Authorization Server module 7.0.0 through 7.0.4, when Dynamic Client R

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This month
CRITICAL 9.6UPGRADE

CVE-2026-59354 is a critical-severity flaw (CVSS 9.6) affecting spring security. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In versions of Spring Security's OAuth2 Authorization Server module 7.0.0 through 7.0.4, when Dynamic Client Registration is explicitly enabled, the registration endpoint performs insufficient validation of certain client metadata fields supplied by the registering client. An attacker who possesses a valid Initial Access Token can register a malicious client with crafted metadata, which, depending on server configuration and how the metadata is l

Why this priority

  • Critical severity

A fixed release or distro patch exists.

Risk facts

CVSS score9.6 (Critical)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededLow
User interactionNone
EPSS exploit chance0.5% (top 58%)
CISA exploited listNo
WeaknessCWE-20
Published2026-08-27
Last modified2026-09-01
Publisher (CNA): VMware · Vendor: vmware

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

Am I affected?

Timeline

vmware spring security UPGRADE
Affected: >= 7.0.0 and < 7.0.5
Fixed in: 7.0.5
Safe to downgrade to: a release before 7.0.0
1. Check installed version
apt-cache policy spring-security || rpm -q spring-security || spring-security --version
2. UPGRADE to 7.0.5 (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 7.0.0 (Debian / Ubuntu)
apt-cache madison spring-security sudo apt install spring-security=<VERSION_BEFORE_7.0.0> 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_7.0.0> 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.
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-2026-59354?

spring security: upgrade to 7.0.5. Exact commands for each OS are on this page.

Is CVE-2026-59354 being exploited?

CVE-2026-59354 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-2026-59354 affect?

CVE-2026-59354 affects spring security. Severity is critical (CVSS 9.6). In versions of Spring Security's OAuth2 Authorization Server module 7.0.0 through 7.0.4, when Dynamic Client Registration is explicitly enabled, the registration endpoint performs insufficient validation of certain client metadata fields su

How urgent is CVE-2026-59354?

Priority 44/100. Critical severity

Software pages

VMware vulnerabilities

Related CVEs

References

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