CVE-2026-59396
DoS Vulnerability in UAA Related to JWKS URI Handling
CVSS Score
4.9
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | cloud foundry |
| Product | uaa |
| Published | Oct 30, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
Cloud Foundry / UAA
76.23.0 < 79.9.0
Cloud Foundry / cf-deployment
0 < 60.11.0