CVE-2026-73483

Flowise (packages flowise and flowise-components) in versions <= 3.1.2 contain a sandbox escape in the vm2/@flowiseai/nodevm JavaScript sandbox. An authenticated user with access to the /api/v1/node-custom-function endpoint can escape the sandbox by supplying attacker-controlled executablePath and args parameters to puppeteer.launch(), which internally invokes child_process.spawn() outside the sandbox boundary. This allows execution of arbitrary OS commands as the Flowise process user (root in the official Docker image) and arbitrary host file disclosure via Chromium's file:// URL handling. In versions 3.0.8–3.1.2 exploitation requires ALLOW_BUILTIN_DEP=true; earlier versions are exploitable by default. Fixed in 3.1.3.

• CWE-78

• https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-9gvv-qjj3-2p6gExploit, Mitigation, Vendor Advisory
• https://www.vulncheck.com/advisories/flowise-before-sandbox-escape-via-puppeteerThird Party Advisory
• https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-9gvv-qjj3-2p6gExploit, Mitigation, Vendor Advisory

Published

Aug 13, 2026

Last Modified

Sep 3, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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