CVE-2026-73484Public exploitNetwork attack vectorHinoki check available

Authenticated sandbox escape via unblocked Pandas methods

Published Aug 13, 2026 · Updated Aug 13, 2026

Sandbox escape in Flowise before 3.1.3 allows remote authenticated users to read uploaded CSV data or write files on the server. The pythonCodeValidator.ts denylist omits native Pandas DataFrame methods, so Pyodide executes to_csv, to_json, pipe, and query calls that pass validation. Access to a CSVAgent or CSV upload is required; exploitation exposes dataset records or permits arbitrary filesystem writes without reported service interruption.

CVSS severity8.6
High
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Sandbox escape in Flowise before 3.1.3 allows remote authenticated users to read uploaded CSV data or write files on the server. The pythonCodeValidator.ts denylist omits native Pandas DataFrame methods, so Pyodide executes to_csv, to_json, pipe, and query calls that pass validation. Access to a CSVAgent or CSV upload is required; exploitation exposes dataset records or permits arbitrary filesystem writes without reported service interruption.

The record

CVE
CVE-2026-73484
Published
Aug 13, 2026
Updated
Aug 13, 2026
Vendor
FlowiseAI
Product
Flowise
Classifications
CWE-184, T1190
Attack vector
network
Privileges
authenticated

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 privilegesauthenticated

What is affected?

FlowiseAI · Flowiseversion=0 <3.1.3

Published CVSS scores

8.6FlowiseAICVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-184Incomplete List of Disallowed Inputs
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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