CVE-2026-61643
FastGPT: workflow runtime can execute another user's private HTTP toolset
Description
FastGPT is a knowledge-based AI application platform. From 4.14.17 until 4.15.0-beta5, an authenticated FastGPT user can save a workflow node that points to another user's private HTTP toolset by using a crafted saved tool id such as http-<victim_toolset_app_id>/<tool_name>. The normal toolset routes deny access, but the workflow save and runtime path did not apply the same authorization check to the referenced toolset, allowing /api/v2/chat/completions to resolve the saved reference and execute the victim-owned HTTP tool. This issue is fixed in version 4.15.0-beta5.
INFO
Published Date :
July 15, 2026, 6:16 p.m.
Last Modified :
Oct. 24, 2026, 9:10 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | MEDIUM | MITRE-CVE |
Solution
- Update FastGPT to version 4.15.0-beta5.
- Review saved workflow nodes for unauthorized tool references.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-61643.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-61643 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-61643
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-61643 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-61643 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Oct. 24, 2026
Action Type Old Value New Value Added Translation Title: FastGPT de labring, Description: FastGPT es una plataforma de aplicación de IA basada en conocimiento. Desde la versión 4.14.17 hasta la 4.15.0-beta5, un usuario autenticado de FastGPT puede guardar un nodo de flujo de trabajo que apunta al conjunto de herramientas HTTP privado de otro usuario utilizando un ID de herramienta guardado manipulado, como http-[victim_toolset_app_id]/[tool_name]. Las rutas normales del conjunto de herramientas deniegan el acceso, pero la ruta de guardado y tiempo de ejecución del flujo de trabajo no aplicó la misma comprobación de autorización al conjunto de herramientas referenciado, permitiendo que /API/v2/chat/completions resolviera la referencia guardada y ejecutara la herramienta HTTP propiedad de la víctima. Este problema está solucionado en la versión 4.15.0-beta5. -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 20, 2026
Action Type Old Value New Value Added Reference https://github.com/labring/FastGPT/security/advisories/GHSA-93r3-wqq3-c5ch Added SSVC {'id': 'CVE-2026-61643', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-07-20T14:31:52.902899Z'} -
New CVE Received by [email protected]
Jul. 15, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'labring', 'product': 'FastGPT', 'versions': [{'status': 'affected', 'version': '>= 4.14.17, < 4.15.0-beta5'}]}] Added Description FastGPT is a knowledge-based AI application platform. From 4.14.17 until 4.15.0-beta5, an authenticated FastGPT user can save a workflow node that points to another user's private HTTP toolset by using a crafted saved tool id such as http-<victim_toolset_app_id>/<tool_name>. The normal toolset routes deny access, but the workflow save and runtime path did not apply the same authorization check to the referenced toolset, allowing /api/v2/chat/completions to resolve the saved reference and execute the victim-owned HTTP tool. This issue is fixed in version 4.15.0-beta5. Added CVSS V3.1 AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:N Added CWE CWE-863 Added Reference https://github.com/labring/FastGPT/releases/tag/v4.15.0-beta5 Added Reference https://github.com/labring/FastGPT/security/advisories/GHSA-93r3-wqq3-c5ch