CVE-2026-61643 | FastGPT is a knowledge-based AI application platform. From 4… | CVSS 5.9 MEDIUM

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.

Metadata

CVE ID: CVE-2026-61643
State: PUBLISHED
Assigner: GitHub_M
Reserved: 2026-07-10 17:38 UTC
Published: 2026-07-15 17:03 UTC
Last updated: 2026-07-15 17:03 UTC
Primary CWE: CWE-863
CWE-863: Incorrect Authorization
Vendor / Product: labring / FastGPT
Sources: cve.org · NVD

Severity & Metrics

5.9 MEDIUM CVSS 3.1

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

Affected products (1)

Vendor	Product	Platform	Versions
labring	FastGPT	—	>= 4.14.17, < 4.15.0-beta5

Weakness (CWE)

CWE	Source	Description
CWE-863	cna	CWE-863: Incorrect Authorization

CVSS scores (1)

Score	Severity	Version	Source	Vector
5.9	MEDIUM	3.1	cna	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:N

References (2)

https://github.com/labring/FastGPT/security/advisories/GHSA-93r3-wqq3-c5ch https://github.com/labring/FastGPT/security/advisories/GHSA-93r3-wqq3-c5ch
https://github.com/labring/FastGPT/releases/tag/v4.15.0-beta5 https://github.com/labring/FastGPT/releases/tag/v4.15.0-beta5