Security Advisory
CVE-2026-84655
4.3
MEDIUM
Vulnerability Description
Jenkins 2.579 and earlier, LTS 2.568.2 and earlier does not escape map keys when serializing objects as JSON and Python through its REST API, allowing attackers able to control map property names to inject arbitrary fields into JSON and Python API responses.
Published Date
September 2, 2026
Official Source
NIST NVD Advisory