CVE-2026-92126 Jenkins Project CVE debrief

Who should care

Defenders responsible for Jenkins deployments should assess exposure and prioritize remediation. They should also verify sandbox restrictions and review compensating controls for exposed systems. Additionally, they should track exceptions, retest remediated assets, and close the item only after evidence is documented.

Why it matters

CVE-2026-92126 allows attackers to execute code outside the sandbox in Jenkins Script Security Plugin, impacting deployments with sandboxed scripts.

• Code execution outside sandbox
• Potential for unauthorized access
• Need for sandbox restriction verification
• Remediation priority for affected versions

Technical summary

The Jenkins Script Security Plugin has a vulnerability allowing attackers with permission to define and run sandboxed scripts, including Pipelines, to execute code outside the sandbox if a suitable class is present on the classpath of the component that evaluates the script. This issue affects versions up to 1415.v9a_f9b_3a_c253d. The vulnerability is caused by the plugin's failure to reject @Builder annotations whose builderStrategy member names an arbitrary class. This allows attackers to execute code outside the sandbox if a suitable class is present on the classpath of the component that evaluates the script.

Defensive priority

Defenders should prioritize verifying sandbox restrictions and assessing exposure to this vulnerability.

Recommended defensive actions

• Verify sandbox restrictions for Jenkins Script Security Plugin
• Assess exposure to CVE-2026-92126
• Prioritize remediation for affected versions
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and NVD vulnerability detail page provide information on the vulnerability, including its description, CVSS score, and affected versions. The CVE record was published on 2026-09-16T14:17:14.580Z and has not been modified since then. The vulnerability has a CVSS score of 8.5 and is considered HIGH severity. The NVD vulnerability detail page provides additional information on the vulnerability, including its impact and potential mitigations.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.