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CVE-2026-69264 critical CVSS 9.8

Code Injection in flowise (CVE-2026-69264)

Summary

Code injection in flowise (CVE-2026-69264). Successful exploitation can lead to full system takeover. Exploitable via POST /api/v1/prediction/. Mitigation: upgrade to 3.1.3 or later.

Original description

The description as published by the source.

Summary

Flowise's 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 JS string to
js.eval, dynamically import any Node built-in module (fs, 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 any agentflows/chatflows
update permission) plants a CSV Agent node with a crafted csvFile. Once the
chatflow is exposed via the (whitelisted, public) POST /api/v1/prediction/:id
endpoint, any unauthenticated request triggers the host RCE.

Details

Vulnerable file: packages/components/nodes/agents/CSVAgent/CSVAgent.ts

The run() method extracts the file segment from the data URI by splitting on
, and using two pop() calls (lines 127–138):

} else {
    if (csvFileBase64.startsWith('[') && csvFileBase64.endsWith(']')) {
        files = JSON.parse(csvFileBase64)
    } else {
        files = [csvFileBase64]
    }

    for (const file of files) {
        if (!file) continue
        const splitDataURI = file.split(',')…

Source: GitHub Security Advisories (Global) NVD GitHub Advisory

Auto-generated summary

Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.

A vulnerability tracked as CVE-2026-69264 has been found in flowise.
Attackers can target a specific entry point like POST /api/v1/prediction/ over the network to misuse the product.
Successful exploitation can lead to full system takeover. CVSS score: 9.8/10.
What to do: upgrade flowise to 3.1.3 or later.
If unsure, ask your IT team or search "flowise CVE-2026-69264" on the vendor's site.

CVE-2026-69264 (flowise) — CWE-94 / CVSS v3 9.8
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Attack surface: POST /api/v1/prediction/ / POST /api/v1/chatflows / CSVAgent / csvFile
Patched: 3.1.3 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.

❓ What is the problem

Arbitrary code execution (CWE-94) exists in flowise. Attackers reach the vulnerable code path via POST /api/v1/prediction/ without authentication.

📍 Affected scope

Check the vendor advisory for the affected versions of flowise. Attack surface: POST /api/v1/prediction/ / POST /api/v1/chatflows / CSVAgent / csvFile.

🔥 Severity

Severity: Critical (CVSS 9.8/10). Successful exploitation can lead to full system takeover.

🔧 How to fix

Update to 3.1.3.

🛡️ Workaround

Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.

🔍 Detection

Search webserver/proxy logs for unusual POST /api/v1/prediction/ requests with malformed payloads or SQL meta-characters. Run grep -r 'flowise' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.

Response actions

Concrete steps and command examples for SOC/SRE teams to execute in order

  1. 1
    Identify exposure identify 
    grep -r 'flowise' . | grep -v node_modules

    リポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で flowise を grep し、稼働しているサービス・バージョンを把握する。

  2. 2
    Hunt for indicators of compromise detect 
    grep 'POST /api/v1/prediction/' /var/log/nginx/access.log | grep -E '(unusual_payload|sqli_pattern)'

    アクセスログで POST /api/v1/prediction/ への異常なリクエスト (不正な認証ヘッダ・SQLメタ文字)を過去 30〜90日分捜索。WAF/SIEM があれば該当パスのアラート発火履歴を確認。

  3. 3
    Apply patch patch 
    Upgrade flowise to 3.1.3

    ステージング環境で 3.1.3 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスと、Step 2 で見つけた異常検知の続報チェックを含めること。

  4. 4
    Post-deployment verification verify 
    Replay attack against POST /api/v1/prediction/ on staging to confirm patch closes the vector

    パッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番では Step 2 と同じログクエリでアラート再発が無いか継続監視。

Affected packages

npm flowise
[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"3.1.3"}]}]
npm flowise-components
[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"3.1.3"}]}]

References

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