CVE-2026-73486

critical · 9

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.

CVSS

0.7%

EPSS (exploit prob.)

50th

EPSS percentile

2026-08-13

Published

CVSS:4.0/AV:N/AC:H/AT:N/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

Weaknesses

CWE-94

Affected products

Vendor	Product	Affected versions
flowiseai	flowise	< 3.1.3

Check a specific version with /api/v1/cve/match.

References

https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-4878-cqgq-j53v
https://www.vulncheck.com/advisories/flowise-before-code-injection-via-csv-agent-customreadcsv
https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-4878-cqgq-j53v

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-73486