Vulnerability · Published Jul 15, 2026 · Assigned by GitHub_M

CVE-2026-61643FastGPT: workflow runtime can execute another user's private HTTP toolset

Medium 5.9

In plain English

A medium-severity incorrect authorization in FastGPT from labring. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 9% of all known vulnerabilities).

Severity (CVSS 3.1)5.9Medium

Exploit odds (30 days)0.2%top 90.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

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

Weakness: CWE-863 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:N

References

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