Unsafe reflection in Pipeline: Groovy - CVE-2026-57284
Published: June 29, 2026
Vulnerability identifier: #VU135704
CSH Severity: Medium
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-57284
CWE-ID: CWE-470
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to compromise the target system.
The vulnerability exists due to the affected plugin does not restrict the types that can be instantiated through the Pipeline Snippet Generator. A remote user can instantiate types related to job or system configuration other than Pipeline steps.
Affected software
Pipeline: Groovy
How to mitigate CVE-2026-57284
Install updates from vendor's website.
Pipeline: Groovy - update to 4331.4333.v50a_b_076c5199