Advisory details:
github_osv / GHSA-4jpm-cgx2-8h37
| Advisory ID | github_osv/GHSA-4jpm-cgx2-8h37 |
| Aliases |
CVE-2026-41266
|
| Summary | Flowise: Sensitive Data Leak in public-chatbotConfig ### Summary `/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. ### 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. |
| Status | Published |
| Exploitability | 0.5 |
| Weighted Severity | 6.9 |
| Risk | 3.5 |
| Affected and Fixed Packages | Package Details |
| Introduced and Fixed Package Commit Patches | Package Commit Patches Details |
| System | Score | Found at |
|---|---|---|
| cvssv3.1 | 7.5 | https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-4jpm-cgx2-8h37/GHSA-4jpm-cgx2-8h37.json |
| cvssv4 | 7.7 | https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-4jpm-cgx2-8h37/GHSA-4jpm-cgx2-8h37.json |
| generic_textual | HIGH |
| Reference id | Reference type | URL |
|---|---|---|
| https://github.com/FlowiseAI/Flowise | ||
| https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-4jpm-cgx2-8h37 | ||
| CVE-2026-41266 | https://nvd.nist.gov/vuln/detail/CVE-2026-41266 |
No EPSS data available for this advisory.
| Patch URL | |
|---|---|
| There are no known patches. | |
| Attack Vector (AV) | Attack Complexity (AC) | Privileges Required (PR) | User Interaction (UI) | Scope (S) | Confidentiality Impact (C) | Integrity Impact (I) | Availability Impact (A) |
|---|---|---|---|---|---|---|---|
network adjacent_network local physical |
low high |
none low high |
none required |
unchanged changed |
high low none |
high low none |
high low none |
| Attack Vector (AV) | Attack Complexity (AC) | Attack Requirements (AT) | Privileges Required (PR) | User Interaction (UI) | Vulnerable System Impact Confidentiality (VC) | Vulnerable System Impact Integrity (VI) | Vulnerable System Impact Availability (VA) | Subsequent System Impact Confidentiality (SC) | Subsequent System Impact Integrity (SI) | Subsequent System Impact Availability (SA) |
|---|---|---|---|---|---|---|---|---|---|---|
network adjacent local physical |
low high |
none present |
none low high |
none passive active |
high low none |
high low none |
high low none |
high low none |
high low none |
high low none |
Vector: SSVCv2/E:P/A:Y/T:P/P:M/B:A/M:M/D:T/2026-04-25T01:26:39Z/
Decision: Track
Source URL: https://github.com/cisagov/vulnrichment/blob/develop/2026/41xxx/CVE-2026-41266.json
Source Advisory: vulnrichment/CVE-2026-41266
[{'Exploitation': 'poc'},
{'Automatable': 'yes'},
{'Technical Impact': 'partial'},
{'Mission Prevalence': 'minimal'},
{'Public Well-being Impact': 'material'},
{'Mission & Well-being': 'medium'}]