CVE-2026-73602: Flowiseai Flowise

Critical severity, CVSS 9.9. EPSS: 0.8% chance of exploitation in the next 30 days.

Flowise before 3.1.3 contains a sandbox escape vulnerability in the vm2 JavaScript sandbox that allows authenticated users to execute arbitrary code by exploiting moment locale validation bypass. Attackers can craft a fake String object with a match function that bypasses path traversal checks to load and execute malicious JavaScript files stored in the document store outside the sandbox.

Affected products

• Flowiseai Flowise: before 3.1.3 (fixed in 3.1.3)

Published 2026-08-13. Last modified 2026-09-04.