CVE-2026-59354

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 later rendered or used, may result in Stored Cross-Site Scripting (XSS), Privilege Escalation, or Server-Side Request Forgery (SSRF).

CVSS v3 9.6 CRITICAL

9.6^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.1 / Impact : 5.8

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://nvd.nist.gov/vuln-metrics/cvss/v3-calculator?vector=AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N&version=3.1	US Government Resource Third Party Advisory
https://spring.io/security/cve-2026-59354	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:vmware:spring_security:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-08-27 10:16

Updated : 2026-09-01 16:01

NVD link : CVE-2026-59354

Mitre link : CVE-2026-59354

CVE.ORG link : CVE-2026-59354

JSON object : View

Products Affected

vmware

spring_security

CWE

CWE-20

Improper Input Validation

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