Vulnerability · Published Aug 4, 2026 · Assigned by GitHub_M

CVE-2026-69264Flowise: RCE via CSVAgent csvFile data URI base64 segment is interpolated into Python source without validation

Critical 9.4

In plain English

A critical-severity code injection in Flowise from FlowiseAI. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 1.1% (higher than 66% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)9.4Critical

Exploit odds (30 days)1.1%top 33.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

Prior to 3.1.3, Flowise CSVAgent interpolates an attacker-controlled segment of the csvFile data URI directly into a Python source-code template that is then executed by Pyodide. Because Pyodide is loaded with the default js bridge to globalThis, which on Node.js exposes eval and dynamic import, the attacker can break out of the Python string literal, hand a JavaScript string to js.eval, dynamically import Node built-in modules such as fs and child_process, and execute arbitrary file I/O or OS commands as the Flowise process. The two validator paths around this code, validatePythonCodeForDataFrame and validateCustomReadCSVFunction, are never applied to the bootstrap template. A workspace user with chatflows:create or agentflows/chatflows update permission can plant a CSV Agent node with a crafted csvFile; once the chatflow is exposed via POST /api/v1/prediction/:id, any unauthenticated request triggers host remote code execution. This issue is fixed in version 3.1.3.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	flowise	3.1.3	GHSA-4j8x-x6v7-w9rq
npm	flowise-components	3.1.3	GHSA-4j8x-x6v7-w9rq

Affected products (as reported)

Vendor	Product	Versions
FlowiseAI	Flowise	< 3.1.3

Weakness: CWE-94, CWE-95 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

References

https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-4j8x-x6v7-w9rq x_refsource_CONFIRM
https://github.com/FlowiseAI/Flowise/pull/6499 x_refsource_MISC
https://github.com/FlowiseAI/Flowise/commit/f4e2794f6a576b94578f2fdafbf49c2fb304626c x_refsource_MISC
https://github.com/FlowiseAI/Flowise/releases/tag/flowise@3.1.3 x_refsource_MISC