CVE-2026-57280
Description
A flaw was found in Jenkins Script Security Plugin. This vulnerability allows attackers who can provide sandboxed Groovy scripts to bypass security sandbox protections. By exploiting a failure to properly intercept implicit type casts in typed for-each loops, an attacker can invoke arbitrary constructors, potentially leading to arbitrary code execution within the Jenkins environment.
Statement
Red Hat rates this as an Important vulnerability in the Jenkins Script Security Plugin. Attackers with the ability to provide sandboxed Groovy scripts can bypass sandbox protections due to improper handling of implicit type casts in typed for-each loops, allowing arbitrary constructor invocation and potential code execution within the Jenkins JVM. The scope is unchanged (S:U) because the sandbox and the Jenkins controller share the same security authority — a sandbox escape executes code in the same context rather than crossing a trust boundary to a separate system.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 8.8 | N/A | 8.8 |
| Attack Vector | Network | N/A | Network |
| Attack Complexity | Low | N/A | Low |
| Privileges Required | Low | N/A | Low |
| User Interaction | None | N/A | None |
| Scope | Unchanged | N/A | Unchanged |
| Confidentiality | High | N/A | High |
| Integrity Impact | High | N/A | High |
| Availability Impact | High | N/A | High |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
cve.org: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Understanding the Weakness (CWE)
Other
Technical Impact: Varies by Context
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