CVE-2026-53435

In Jenkins 2.567 and earlier, LTS 2.555.2 and earlier, it is possible for attackers to have Jenkins deserialize arbitrary types defined in Jenkins core or plugins from an attacker-controlled `config.xml` submission in a way that allows them to handle HTTP requests afterwards. This can be used to impersonate any user and send HTTP requests on their behalf, up to and including use of the Script Console to run arbitrary code, or to read arbitrary files from the Jenkins controller.

Affected products

Jenkins

Jenkins

< 2.555.3, 2.568

Fix

Available

CVSS 3.1

8.8 HIGH

EPSS

19.0% (97th percentile)

Weakness

CWE-502

NVD status

Modified

Published

2026-06-10