CVE-2026-70477Public exploitNetwork attack vector

Unauthenticated code execution via CSV Agent prompt injection

Published Aug 4, 2026 · Updated Aug 4, 2026

Code injection in Flowise before 3.1.3 allows remote attackers to execute arbitrary code through prompts sent to a CSV Agent chatflow. CSV_Agents.run places user input in an LLM prompt, passes the returned Python through a bypassable regex blocklist, and evaluates it in unsandboxed Pyodide. Exploitation requires a reachable chatflow configured with the CSV Agent and an LLM; successful code runs with the service account's privileges.

CVSS severity9.5
Critical
EPSS probability0.83%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code injection in Flowise before 3.1.3 allows remote attackers to execute arbitrary code through prompts sent to a CSV Agent chatflow. CSV_Agents.run places user input in an LLM prompt, passes the returned Python through a bypassable regex blocklist, and evaluates it in unsandboxed Pyodide. Exploitation requires a reachable chatflow configured with the CSV Agent and an LLM; successful code runs with the service account's privileges.

The record

CVE
CVE-2026-70477
Published
Aug 4, 2026
Updated
Aug 4, 2026
Vendor
FlowiseAI
Product
Flowise
Classifications
CWE-94, T1059.006
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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=< 3.1.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

FlowiseAI · Flowiseversion=< 3.1.2

Published CVSS scores

9.5GitHubCVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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')
T1059.006Command and Scripting Interpreter: Python

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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