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

> Authenticated users can execute another user's private HTTP tools via crafted workflow references, bypassing authorization checks.

- **Severity:** Medium 5.9 (`CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 15 Jul 2026
- **Updated:** 20 Jul 2026
- **Also known as:** GHSA-93r3-wqq3-c5ch

## What is CVE-2026-61643?

CVE-2026-61643 is a medium-severity missing authorization vulnerability in labring FastGPT, published on 15 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### 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.

Weakness: CWE-863 (Incorrect Authorization)

## Which versions are affected by CVE-2026-61643?


## How do I fix CVE-2026-61643?

No fix has been published for CVE-2026-61643 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-61643 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-61643 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-61643 and fix it if it is affected.

What it is: CVE-2026-61643 is a medium-severity missing authorization vulnerability in labring FastGPT, published on 15 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-61643 exists.

Affected product: labring FastGPT. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-61643/ (Markdown: https://insights.sbomify.com/CVE-2026-61643/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-61643
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-61643
- OSV: https://osv.dev/vulnerability/CVE-2026-61643

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-61643/
Summaries are generated and may contain mistakes; the official description above is the record.