Vulnerability-Lookup

CVE-2026-41266 (GCVE-0-2026-41266)

Vulnerability from cvelistv5 – Published: 2026-04-23 19:11 – Updated: 2026-04-25 01:27

Title

Flowise: Sensitive Data Leak in public-chatbotConfig

Summary

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.

Severity

7.7 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-04-25 01:26 UTC

CWE

CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
CWE-522 - Insufficiently Protected Credentials
CWE-862 - Missing Authorization

Assigner

GitHub_M mitre root

References

1 reference

URL	Tags
https://github.com/FlowiseAI/Flowise/security/adv…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version	CPE status
FlowiseAI	Flowise	Affected: < 3.1.0	guessed

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-41266

Vulnerability from fkie_nvd - Published: 2026-04-23 20:16 - Updated: 2026-06-17 10:46

Severity

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-4jpm-cgx2-8h37	Exploit, Vendor Advisory
	134c704f-9b21-4f2e-91b3-4a467353bcc0	https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-4jpm-cgx2-8h37	Exploit, Vendor Advisory

Impacted products

	Vendor	Product	Version
	flowiseai	flowise	*

JSON

To clipboard

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          "product": "Flowise",
          "vendor": "FlowiseAI",
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  "lastModified": "2026-06-17T10:46:24.527",
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GHSA-4JPM-CGX2-8H37

Vulnerability from github – Published: 2026-04-16 21:44 – Updated: 2026-04-24 20:57

Summary

Flowise: Sensitive Data Leak in public-chatbotConfig

Details

Summary

/api/v1/public-chatbotConfig/:idep 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.

Details

Knowledge of chatflow UUID can be obtained from embedded chat widgets, referrer headers or logs and it's the only prerequest.

getSinglePublicChatbotConfig function in packages/server/src/services/chatflows/index.ts returns the full flowData object without authorization check or data sanitization.

There is a comment as "Safe as public endpoint as chatbotConfig doesn't contain sensitive credential" but flowData does contain sensitive data such as:

type: 'password' fields are stored in plaintext (unstructuredAPIKey in S3File node). HTTP Authorization headers in POST / GET Requests nodes. Internal API endpoints and webhook URLs.

PoC

Add an S3 File node, set "File Processing Method" to "Unstructured".
Enter an API key in "Unstructured API KEY" field or add a Requests Post node with Authorization header.
Save the chatflow.

curl -s "https://localhost/api/v1/public-chatbotConfig/{CHATFLOW_UUID}"

Response:

{
  "flowData": "{...\"unstructuredAPIKey\":\"victim_key\"...\"requestsPostHeaders\":\"Bearer victim_token\"...}"
}

Impact

Impacts all Flowise Cloud users with chatflows containing password type fields or any HTTP headers. And self hosted Flowise instances exposed to the internet.

Severity

7.5 (High)


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

7.7 (High)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N

Show details on source website

JSON

To clipboard

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  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 3.0.13"
      },
      "package": {
        "ecosystem": "npm",
        "name": "flowise"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.1.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-41266"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-200",
      "CWE-522",
      "CWE-862"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-04-16T21:44:49Z",
    "nvd_published_at": "2026-04-23T20:16:15Z",
    "severity": "HIGH"
  },
  "details": "### Summary\n\n`/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.\n\n### Details\n\nKnowledge of chatflow UUID can be obtained from embedded chat widgets, referrer headers or logs and it\u0027s the only prerequest. \n\n`getSinglePublicChatbotConfig` function in `packages/server/src/services/chatflows/index.ts` returns the full **flowData** object without authorization check or data sanitization.\n\nThere is a comment as **\"Safe as public endpoint as chatbotConfig doesn\u0027t contain sensitive credential\"** but **flowData** does contain sensitive data such as:\n\n`type: \u0027password\u0027` fields are stored in plaintext (unstructuredAPIKey in S3File node).\nHTTP Authorization headers in POST / GET Requests nodes.\nInternal API endpoints and webhook URLs.\n\n### PoC\n\n- Add an S3 File node, set \"File Processing Method\" to \"Unstructured\".\n- Enter an API key in \"Unstructured API KEY\" field or add a Requests Post node with Authorization header.\n- Save the chatflow.\n\n`curl -s \"https://localhost/api/v1/public-chatbotConfig/{CHATFLOW_UUID}\"`\n\nResponse:\n\n```\n{\n  \"flowData\": \"{...\\\"unstructuredAPIKey\\\":\\\"victim_key\\\"...\\\"requestsPostHeaders\\\":\\\"Bearer victim_token\\\"...}\"\n}\n```\n\n### Impact\n\nImpacts all Flowise Cloud users with chatflows containing password type fields or any HTTP headers. And self hosted Flowise instances exposed to the internet.",
  "id": "GHSA-4jpm-cgx2-8h37",
  "modified": "2026-04-24T20:57:44Z",
  "published": "2026-04-16T21:44:49Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-4jpm-cgx2-8h37"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-41266"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/FlowiseAI/Flowise"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Flowise: Sensitive Data Leak in public-chatbotConfig "
}

WID-SEC-W-2026-1145

Vulnerability from csaf_certbund - Published: 2026-04-15 22:00 - Updated: 2026-05-11 22:00

Summary

Flowise: Mehrere Schwachstellen

Severity

Hoch

Scope

19 vulnerabilities in this advisory, including CVE-2026-41266.

CVE-2026-41266

Known affected: 1 product

Open the full advisory

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-41266 (GCVE-0-2026-41266)

FKIE_CVE-2026-41266

GHSA-4JPM-CGX2-8H37

Summary

Details

PoC

Impact

WID-SEC-W-2026-1145

Tags

Sightings

Nomenclature

Related by attack behaviour