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.
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Freebsd | — | Upgrade jenkinsUpgrade jenkins-lts | Jun 18, 2026 | Jun 17, 2026 |
| Jenkins 2026 06 10 | — | Upgrade Jenkins to version 2.568Upgrade Jenkins to the latest versionUpgrade Jenkins LTS to version 2.555.3Upgrade Jenkins LTS to the latest version | Jun 11, 2026 | Jun 10, 2026 |
Prioritise with Active Threat Intelligence
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub