CVE-2026-57284 Jenkins Pipeline: Groovy Plugin vulnerable to unrestricted instantiation of types
Attackers can instantiate arbitrary types via the Pipeline Snippet Generator, potentially leading to code execution or privilege escalation in Jenkins.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-57284?
CVE-2026-57284 is a medium-severity code injection vulnerability in Jenkins Pipeline: Groovy Plugin, published on 24 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Jenkins Pipeline: Groovy Plugin 4331.v9d06ed4658ff and earlier does not restrict the types that can be instantiated through the Pipeline Snippet Generator, allowing attackers to instantiate types related to job or system configuration other than Pipeline steps.
Weakness: CWE-470
Which versions are affected by CVE-2026-57284?
2 open source packages ship an affected version, including io.jenkins.plugins:pipeline-groovy-lib. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
io.jenkins.plugins:pipeline-groovy-lib Maven | All versions | 4331.4333 |
io.jenkins.plugins:pipeline-groovy-lib Maven | All versions | 4331.4333 |
Products include Jenkins Pipeline\.
How do I fix CVE-2026-57284?
Upgrade io.jenkins.plugins:pipeline-groovy-lib to 4331.4333 or later.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-57284 being exploited?
There is no known exploitation of CVE-2026-57284 in the wild and no public exploit code.
Other vulnerabilities in Jenkins Pipeline: Groovy Plugin
- CVE-2019-1003030 Jenkins Matrix Project Plugin Remote Code Execution
- CVE-2022-43402 Jenkins Pipeline: Groovy Plugin allows sandbox protection bypass and arbitrary code execution
- CVE-2019-1003041 Sandbox bypass vulnerability in Jenkins Pipeline: Groovy Plugin
- CVE-2022-43407 CSRF protection for any URL can be bypassed in Jenkins Pipeline: Input Step Plugin
- CVE-2022-25173 Improper Neutralization of Special Elements used in an OS Command in Jenkins Pipeline: Groovy Plugin
Sources
Also known as GHSA-2w2h-gwwj-fh3q.