RCE in Flowiseai Flowise
CVE-2026-73486
Flowise before 3.1.3 contains a code injection vulnerability in the CSV Agent node's customReadCSV parameter that allows authenticated attackers to execute arbitrary Python code. The validator uses a static regex blocklist that can be bypassed through obfuscation techniques, enabling attackers to execute code in the unsandboxed pyodide environment with full system access.
Vulnerability class: RCE (Remote Code Execution)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.007 (49.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 49.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.007 · change: +0.003
Affected products
- Flowiseai Flowise — versions 0, 3.1.3
Weakness classification (CWE)
References
- github.com/FlowiseAI/Flowise/security/advisories/GHSA-4878-cqgq-j53v (Exploit, vendor-advisory, Vendor Advisory)
- www.vulncheck.com/advisories/flowise-before-code-injection-via-csv-agent-custom… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-73486?
- CVE-2026-73486 is a high-severity vulnerability in Flowiseai Flowise, classified under Code Injection. CVSS score: 8.8/10. Published 2026-08-13.
- How severe is CVE-2026-73486?
- High severity. CVSS v3 base score is 8.8 out of 10.