CVE-2026-59396

A denial-of-service vulnerability exists in UAA's private_key_jwt client-authentication mechanism. When UAA retrieves a remote JWKS URI, it caches the response. Invalid authentication attempts can trigger full deserialization of this cached data. An attacker with prerequisites (write access to clients or a compromised endpoint) can send anonymous requests that force repeated parsing of large cached objects, causing excessive CPU usage and potential Java heap exhaustion via OutOfMemoryError, resulting in service unavailability.

CVSS v3 4.9 MEDIUM

4.9^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.2 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://www.cloudfoundry.org/blog/cve-2026-59396-dos-vulnerability-in-uaa-related-to-jwks-uri-handling-2/

Configurations

No configuration.

History

30 Oct 2026, 20:17

Type	Values Removed	Values Added
CWE		CWE-400

30 Oct 2026, 09:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-30 09:17

Updated : 2026-10-30 20:17

NVD link : CVE-2026-59396

Mitre link : CVE-2026-59396

CVE.ORG link : CVE-2026-59396

JSON object : View

Products Affected

No product.

CWE

CWE-400

Uncontrolled Resource Consumption

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