Insufficient Validation in Spring Authorization Server Affects Redirects
CVE-2026-59355

6.1MEDIUM

Key Information:

Vendor

Vmware
Status
Spring Authorization Server
Vendor
CVE Published:
27 August 2026

What is CVE-2026-59355?

In certain versions of the Spring Authorization Server, the authorization endpoint's handling of the request_uri parameter lacks sufficient validation. This vulnerability allows an attacker to create a specially crafted request with an invalid request_uri and an unvalidated redirect_uri. Consequently, users may be redirected to malicious sites under the control of the attacker, potentially leading to phishing attacks or other forms of exploitation.

Affected Version(s)

Spring Authorization Server 1.5.0 <= 1.5.7

Spring Authorization Server 1.5.8

Spring Authorization Server 1.5.7.1

References

https://spring.io/security/cve-2026-59355
vendor-advisory

CVSS V3.1

Score:
6.1
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Jon Kjennbakken (Vipps MobilePay)
.