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Critical, CVSS 9.5amended

Flowise: CSV Agent Prompt Injection Remote Code Execution Vulnerability

CVE-2026-70477GHSA-5xvg-pmgg-3mxr

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (flowise-components 3.1.3; flowise 3.1.3), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS 4.0
9.5 · CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H · score source
EPSS
  • CVE-2026-70477: 0.81% estimated exploitation activity in the next 30 days; percentile 57.08 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

-- ABSTRACT ------------------------------------- Trend Micro's Zero Day Initiative has identified a vulnerability affecting the following products: Flowise - Flowise -- VULNERABILITY DETAILS ------------------------ Version tested: 3.1.1 Installer file: https://github.com/FlowiseAI/Flowise (npm install flowise@3.1.1) Platform tested: Ubuntu 25.10 --- A prompt injection sent to a chatflow using a CSV Agent node can cause the LLM to respond with a malicious Python script that bypasses the blocklist validator and executes in an unsandboxed pyodide environment. An attacker can leverage this to execute arbitrary code in the context of the user running the server. Analysis When a user makes a query against a chatflow using the CSV Agent node, the run method of the CSVAgents class is called. This method reads the CSV file, loads a pyodide environment, and uses pandas to extract column names and data types into a dictionary. It then constructs a system prompt using that dictionary and the…

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 4 · amended ·

    Amended from ghsa record GHSA-5xvg-pmgg-3mxr

  2. Revision 3 · amended ·

    Reviewed OSV alias/range/CVSS4 correction; package source scopes and original publication preserved. No customer finding resolved.

  3. Revision 2 · amended ·

    Amended from osv record GHSA-5xvg-pmgg-3mxr

  4. Revision 1 · created ·

    Published from ghsa record GHSA-5xvg-pmgg-3mxr

Agent brief

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# Patch Next advisory brief: CVE-2026-70477

Advisory: Flowise: CSV Agent Prompt Injection Remote Code Execution Vulnerability
IDs: CVE-2026-70477, GHSA-5xvg-pmgg-3mxr
Record: https://patchnext.com/advisories/cve-2026-70477 (revision 4, source checked 26 Oct 2026, 13:00 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Critical (CVSS 9.5)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: flowise-components 3.1.3; flowise 3.1.3. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm flowise-components: affected <= 3.1.2; fixed in 3.1.3
- npm flowise: affected <= 3.1.2; fixed in 3.1.3

## Suggested inspection (read-only)
- `npm ls flowise-components --all`: lists every installed copy and version, including transitive ones. Run in the project root after `npm ci`.
- `npm ls flowise --all`: lists every installed copy and version, including transitive ones. Run in the project root after `npm ci`.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on flowise-components, flowise.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-5xvg-pmgg-3mxr (GitHub-reviewed advisory GHSA-5xvg-pmgg-3mxr lists affected ranges: npm flowise >=0 =0 <=3.1.2)
- Verified: https://osv.dev/vulnerability/GHSA-5xvg-pmgg-3mxr (OSV record GHSA-5xvg-pmgg-3mxr lists affected ranges: npm flowise >=0 =0 <3.1.3 (fixed))

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