by Kastro
Paper/Archive/CVE-2026-73486

CVE-2026-73486

FlowiseAI Flowise — Flowise before 3.1.3 Code Injection via CSV Agent customReadCSV

EPSS 0.7%public exploitCVSS 9.0
critical.is priorityof 100
47
CVSS 9.0 (CNA)9.0 / 10 × 3027.0Not in CISA KEV+300.0EPSS percentile 51.7.517 × 2010.3Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
Flowise< 3.1.33.1.3CNA
Flowise< 3.1.33.1.3CNA

Scores by source

VulnCheck (CNA)9.0CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
CISA ADPSSVCExploitation: poc · Automatable: no · Technical impact: total

References

exploitgithub.com/FlowiseAI/Flowise/security/advisories/GHSA-4878-cqgq-j53vwriteupvulncheck.com/advisories/flowise-before-code-injection-via-csv-agent-customreadcsv