EUVD-2026-52801
GHSA-4j8x-x6v7-w9rq
Severity by source
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Network-reachable, low-complexity code injection; PR:L reflects the workspace write access needed to plant the node, and S:C captures the Python-to-Node host escape yielding full host RCE.
Primary rating from Vendor (GitHub_M).
CVSS VectorVendor: GitHub_M
Lifecycle Timeline
4DescriptionCVE.org
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.
Articles & Coverage 1
AnalysisAI
Remote code execution in FlowiseAI Flowise before 3.1.3 lets an attacker execute arbitrary OS commands as the Flowise process by abusing the CSVAgent node, which interpolates an attacker-controlled base64 segment of the csvFile data URI directly into a Python template run by Pyodide. Because Pyodide's default js bridge exposes globalThis (including eval and dynamic import on Node.js), the injected code can break out of the Python string, call js.eval, import fs and child_process, and run host commands; the surrounding validators are never applied to this bootstrap template. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires two things: (1) an attacker with a workspace account holding chatflows:create or any agentflows/chatflows update permission to plant a CSV Agent node containing a crafted csvFile data URI whose base64 segment escapes the Python string literal; and (2) that chatflow being reachable via the whitelisted POST /api/v1/prediction/:id prediction endpoint, whose invocation is unauthenticated. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a genuine high-priority issue rather than an inflated high-CVSS score. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade to Flowise 3.1.3, which contains the fix (Vendor-released patch: 3.1.3; see https://github.com/FlowiseAI/Flowise/releases/tag/flowise@3.1.3, PR https://github.com/FlowiseAI/Flowise/pull/6499 and commit f4e2794f6a576b94578f2fdafbf49c2fb304626c, advisory GHSA-4j8x-x6v7-w9rq); upgrade both flowise and flowise-components together. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Within 24 hours, inventory all FlowiseAI Flowise deployments and identify running versions, determining which instances are exposed to untrusted networks. …
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External POC / Exploit Code
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