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
flowiseai: flowise
References3
- github.com/FlowiseAI/Flowise/security/advisories/GHSA-rqh4-rxw3… ExploitVendor Advisory
- github.com/FlowiseAI/Flowise/commit/4211bfc8f15746be4019bba557e… Broken Link
- www.vulncheck.com/advisories/flowise-before-sandbox-escape-to-r… Third Party Advisory
Metrics
- CVSS 3.1
-
9.9
CRITICAL
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H - CVSS 4.0
-
9.0
CRITICAL
Score source: CNA
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - EPSS — exploit probability
- 1% percentile: 58 · as of 12 November 2026
- CWE
- CWE-95
Could this be exploited in your environment?
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