CVE-2026-59354 (GCVE-0-2026-59354)
Vulnerability from cvelistv5 – Published: 2026-08-27 06:33 – Updated: 2026-08-28 03:55
VLAI
EPSS
VEX
Title
Spring Security OAuth2 Authorization Server: Insufficient validation of Dynamic Client Registration metadata
Summary
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).
Severity
9.6 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-27 00:00 UTC
CWE
- CWE-20 - Improper Input Validation
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://spring.io/security/cve-2026-59354 | vendor-advisory |
| https://nvd.nist.gov/vuln-metrics/cvss/v3-calcula… | technical-description |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| VMware by Broadcom | Spring Security (OAuth2 Authorization Server module) |
Affected:
7.0.0 , ≤ 7.0.4
(semver)
Unaffected: 7.0.5 (semver) |
guessed |
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