CVE Watch30 de out. de 2026

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

CVSS

4.9

Média

EPSS

0.3%

p21

KEV

—

Exploit Today

0-100

Publicado: 30 de out. de 2026 · Última mod.: 30 de out. de 2026 · CWE-400

EPSS · 30d

0.3%EPSS · 30 dias0.3%

2026-10-302026-11-07

Descrição técnica

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.

Referências oficiais

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

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