CVE-2026-73487Public exploitNetwork attack vector

Unauthenticated data exfiltration via Python validator bypass

Published Aug 13, 2026 · Updated Aug 13, 2026

Prompt injection in Flowise CSV and Airtable Agent nodes before 3.1.3 allows remote attackers to exfiltrate data or reach internal services. The validatePythonCodeForDataFrame() function accepts LLM-generated Python whenever none of 38 blocked regexes match, leaving URL-capable pandas calls such as pd.read_json() executable in Pyodide. A public CSV or Airtable Agent chatflow reachable through the unauthenticated prediction API is required; successful requests can disclose loaded data and access internal HTTP endpoints.

CVSS severity9.0
Critical
EPSS probability0.96%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Prompt injection in Flowise CSV and Airtable Agent nodes before 3.1.3 allows remote attackers to exfiltrate data or reach internal services. The validatePythonCodeForDataFrame() function accepts LLM-generated Python whenever none of 38 blocked regexes match, leaving URL-capable pandas calls such as pd.read_json() executable in Pyodide. A public CSV or Airtable Agent chatflow reachable through the unauthenticated prediction API is required; successful requests can disclose loaded data and access internal HTTP endpoints.

The record

CVE
CVE-2026-73487
Published
Aug 13, 2026
Updated
Aug 13, 2026
Vendor
FlowiseAI
Product
Flowise
Classifications
CWE-94, T1059.006, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <3.1.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

FlowiseAI · Flowiseversion=0 <3.1.3

Published CVSS scores

9.0VulnCheckCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
T1059.006Python
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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