Authenticated RCE via bypassable customReadCSV blocklist
Published Aug 13, 2026 · Updated Aug 13, 2026
Code injection in Flowise before 3.1.3 allows remote authenticated users to execute arbitrary Python code through CSV Agent chatflows. The CSV_Agents run method inserts customReadCSV directly after pd. in a Python script, while its regex blocklist misses obfuscated dangerous constructs before Pyodide executes the script. A valid Flowise account and a crafted CSV Agent chatflow are required; successful exploitation runs commands with the Flowise service account's file and network access.
Summary
What happened
Code injection in Flowise before 3.1.3 allows remote authenticated users to execute arbitrary Python code through CSV Agent chatflows. The CSV_Agents run method inserts customReadCSV directly after pd. in a Python script, while its regex blocklist misses obfuscated dangerous constructs before Pyodide executes the script. A valid Flowise account and a crafted CSV Agent chatflow are required; successful exploitation runs commands with the Flowise service account's file and network access.
The record
- CVE
- CVE-2026-73486
- Published
- Aug 13, 2026
- Updated
- Aug 13, 2026
- Vendor
- FlowiseAI
- Product
- Flowise
- Classifications
- CWE-94, T1059.006
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 13, 2026CVE publishedPublication date reported by the CVE source.
- 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.
- Affected versionversion=0 <3.1.3
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Weakness, pattern, technique
Public exploit references
- CSV_Agent customReadCSV authenticated RCE proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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