CVE-2026-61646 FastGPT: Shared axios SSRF guard validates only the initial URL before following redirects
Authenticated users can bypass SSRF protections via redirect chains to access internal services or cloud metadata, exposing sensitive data.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-61646?
CVE-2026-61646 is a medium-severity server-side request forgery 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. Prior to 4.15.0-beta5, FastGPT's shared SSRF guard validates only the initial request URL before handing the request to axios, and axios follows redirects by default. An authenticated workflow user can configure an HTTP request node to call an attacker-controlled public URL that redirects to cloud metadata, loopback, or internal services that the guard would block on direct request, and the HTTP node returns the response body to the workflow caller. This issue is fixed in version 4.15.0-beta5.
Weakness: CWE-918
Which versions are affected by CVE-2026-61646?
How do I fix CVE-2026-61646?
No fix has been published for CVE-2026-61646 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-61646 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-61646 exists.
Sources
Also known as GHSA-g969-67mv-2qxq.