CVE-2026-73602

critical

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.

References

Advisories
More

https://www.vulncheck.com/advisories/flowise-before-sandbox-escape-to-rce

https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-rqh4-rxw3-93rp

https://github.com/FlowiseAI/Flowise/commit/4211bfc8f15746be4019bba557e29a7ba83d54c5

Details

Source: Mitre, NVD

Published: 2026-08-13

Updated: 2026-09-04

Risk Information

CVSS v2

Base Score: 9

Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C

Severity: High

CVSS v3

Base Score: 9.9

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Severity: Critical

CVSS v4

Base Score: 9

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

Severity: Critical

EPSS

EPSS: 0.00437