EUVD-2026-80749
GHSA-m49g-xg2m-9766
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Network-reachable low-privilege user escapes the Groovy sandbox to run arbitrary code in the controller JVM; the sandbox-to-controller boundary crossing justifies S:C, with full C/I/A on the controller.
Primary rating from Vendor (jenkins).
CVSS VectorVendor: jenkins
Lifecycle Timeline
5DescriptionCVE.org
Jenkins Script Security Plugin 1415.v9a_f9b_3a_c253d and earlier does not reject the @GroovyASTTransformationClass annotation, allowing attackers with permission to define and run sandboxed scripts, including Pipelines, to run an arbitrary AST transformation at compile time, bypassing the sandbox protection and executing arbitrary code in the context of the Jenkins controller JVM.
Articles & Coverage 1
AnalysisAI
Sandbox escape leading to arbitrary code execution inside the Jenkins controller JVM affects Script Security Plugin 1415.v9a_f9b_3a_c253d and earlier because the plugin fails to reject the @GroovyASTTransformationClass annotation in script source. An authenticated Jenkins user with permission to define and run sandboxed scripts, including Pipelines (the CVSS vector carries PR:L), can submit a script that registers a Groovy AST transformation executed at compile time, before the sandbox applies, resulting in high confidentiality, integrity, and availability impact on the controller; our independent assessment scores this 8.8 with a scope change (S:C) rather than the provider's S:U. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires an authenticated Jenkins user holding permission to define and run sandboxed scripts, including Pipelines (typically Job/Configure or equivalent script-submission rights) on an instance running Script Security Plugin 1415.v9a_f9b_3a_c253d or earlier. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a genuine high-priority vulnerability, not CVSS inflation. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Primary remediation is to upgrade the Jenkins Script Security Plugin to the fixed release named in Jenkins Security Advisory 2026-09-16, SECURITY-3925 (https://www.jenkins.io/security/advisory/2026-09-16/#SECURITY-3925%20(1)); the exact fixed plugin version should be taken from that advisory, since it is not present in the data available for this analysis - patch status is therefore best described as "vendor advisory available, fixed version to be confirmed from the advisory" rather than assumed. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory every Jenkins controller running Script Security Plugin 1415.v9a_f9b_3a_c253d or earlier and enumerate the accounts and groups holding Job/Configure, Pipeline-authoring or script-approval rights, since the CVSS vector carries PR:L and only already-authenticated script authors can reach the vulnerable code path; suspend blanket script-approval workflows and strip standing script-authoring rights from anyone who does not strictly need them. …
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External POC / Exploit Code
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