CVE-2026-69254 FlowiseAI CVE debrief

Who should care

Flowise server administrators and users with access to the Flowise server should assess their exposure and take steps to mitigate the vulnerability. This includes verifying the affected versions, applying patches or mitigations, and monitoring the server for suspicious activity. Additionally, security teams should review compensating controls and ensure that the necessary measures are in place to prevent exploitation.

Why it matters

CVE-2026-69254 is a critical vulnerability in Flowise that allows authenticated attackers to execute arbitrary system commands as root. Defenders should verify exposure, assess remediation priority, and apply compensating controls.

• Authenticated attackers can execute arbitrary system commands as root on the Flowise server
• Vulnerability requires verification of affected versions and remediation priority
• Defenders should verify inventory and apply compensating controls
• Remediation involves upgrading to version 3.1.3 or later

Technical summary

The executeJavaScriptCode() function in Flowise accepts caller-provided nodeVMOptions and merges them over the default NodeVM security settings. This allows an authenticated attacker to execute arbitrary system commands as root on the Flowise server by setting nodeVMOptions.require.builtin to allow all built-in modules and then requiring child_process. The vulnerability is caused by the function's acceptance of caller-provided nodeVMOptions and merging them over the default NodeVM security settings, which can be exploited by an attacker to execute arbitrary system commands as root.

Defensive priority

High

Recommended defensive actions

• Upgrade Flowise to version 3.1.3 or later
• Restrict access to the Flowise server to only trusted users
• Monitor Flowise server logs for suspicious activity
• 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 vulnerability allows an authenticated attacker to execute arbitrary system commands as root on the Flowise server by exploiting the executeJavaScriptCode() function. The issue is caused by the function's acceptance of caller-provided nodeVMOptions and merging them over the default NodeVM security settings.

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.