CVE-2026-73483

NVD description

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.

What to do

• NVD lists no fixed version yet: follow the vendor advisory below and keep Flowise off the public internet until a fix ships.
• Do not expose the component's API or UI to the internet without authentication in front of it.

Sources

• NVD: CVE-2026-73483
• 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

Other Flowise CVEs

All Flowise CVEs