What’s Vulnerable › Vulnerabilities

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

• Severity: critical (CVSS 9.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-08-13 · updated 2026-10-24
• Weakness: CWE-95

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: before 3.1.3 — fixed in 3.1.3

How to fix

Upgrade to a fixed version: FlowiseAI Flowise 3.1.3. Check the vendor advisory for mitigations.

References

• https://github.com/FlowiseAI/Flowise/commit/4211bfc8f15746be4019bba557e29a7ba83d54c5
• https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-rqh4-rxw3-93rp
• https://www.vulncheck.com/advisories/flowise-before-sandbox-escape-to-rce

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