CVE-2026-59396
MEDIUM
MEDIUM
Priority: 0.02
BB Relevance:
59/100
Published: 2026-10-30
Modified: 2026-10-30
First seen: 2026-10-30
Status: active
Attack Surface
Network
Low Complexity
No Interaction
CVSS Vector Breakdown
AV:
Network
AC:
Low
PR:
High
UI:
None
S:
X
AT:
None
VC:
None
VI:
None
VA:
High
Description
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.
Affected Software (4)
| Vendor | Product | Version |
|---|---|---|
| Cloud Foundry | UAA | 76.23.0 < 79.9.0 |
| Cloud Foundry | UAA | 76.23.0 < 79.9.0 |
| Cloud Foundry | cf-deployment | 0 < 60.11.0 |
| Cloud Foundry | cf-deployment | 0 < 60.11.0 |