CVE-2026-73487: Flowise before 3.1.3 Prompt Injection RCE via CSV Agent

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.0% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-08-13 · updated 2026-10-24
Weakness: CWE-94

Description

Flowise before 3.1.3 contains a regex-based Python code validator bypass in CSV and Airtable Agent nodes that allows unauthenticated attackers to inject malicious code via prompt injection. Attackers can exploit unblocked pandas functions like pd.read_json() to exfiltrate datasets, perform SSRF against internal services, or achieve code execution through the unauthenticated prediction API.

Affected products

FlowiseAI Flowise: through 3.1.4

References

https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-w7x8-q2gp-5cgg
https://www.vulncheck.com/advisories/flowise-before-prompt-injection-rce-via-csv-agent
https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-w7x8-q2gp-5cgg

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