Vulnerability · Published Aug 13, 2026 · Assigned by VulnCheck

CVE-2026-73602Flowise before 3.1.3 Sandbox Escape to RCE

Critical 9.0

In plain English

A critical-severity security flaw in Flowise from FlowiseAI. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 58% of all known vulnerabilities).

Severity (CVSS 4.0)9.0Critical

Exploit odds (30 days)0.8%top 42.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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 (as reported)

Vendor	Product	Versions
FlowiseAI	Flowise	0 – before 3.1.3

Weakness: CWE-95 · Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

References

GitHub Security Advisory (GHSA-rqh4-rxw3-93rp) vendor-advisory
Patch Commit patch
VulnCheck Advisory: Flowise before 3.1.3 Sandbox Escape to RCE third-party-advisory