RCE in Flowiseai Flowise
CVE-2026-73602
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.9 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.008 (55.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 55.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.008 · change: +0.004
Affected products
- Flowiseai Flowise — versions 0, 3.1.3
Weakness classification (CWE)
References
- github.com/FlowiseAI/Flowise/security/advisories/GHSA-rqh4-rxw3-93rp (Exploit, vendor-advisory, Vendor Advisory)
- github.com/FlowiseAI/Flowise/commit/4211bfc8f15746be4019bba557e29a7ba83d54c5 (patch, Broken Link)
- www.vulncheck.com/advisories/flowise-before-sandbox-escape-to-rce (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-73602?
- CVE-2026-73602 is a critical-severity vulnerability in Flowiseai Flowise, classified under Eval Injection. CVSS score: 9.9/10. Published 2026-08-13.
- How severe is CVE-2026-73602?
- Critical severity. CVSS v3 base score is 9.9 out of 10.