CVE-2026-33712 TypeBot: Unauthenticated SSRF via isolated-vm fetch in preview chat endpoint bypasses SSRF controls
Unauthenticated attackers can exploit SSRF in Typebot's preview endpoint to access internal networks and steal cloud credentials.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-33712?
CVE-2026-33712 is a critical server-side request forgery vulnerability in baptisteArno typebot.io, published on 22 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Typebot is a chatbot builder tool. In versions 3.15.2 and prior, the preview chat endpoint (POST /api/v1/typebots/{typebotId}/preview/startChat) allows unauthenticated users to achieve Server-Side Request Forgery (SSRF) by supplying a custom typebot definition with server-side code blocks. The fetch function exposed inside the isolated-vm sandbox calls Node.js native fetch without the SSRF validation (validateHttpReqUrl) that protects the HTTP Request block. This bypasses all SSRF mitigations added after GHSA-8gq9-rw7v-3jpr. Exploitation of this unauthenticated SSRF vulnerability can lead to cloud credential theft, internal network access and data exfiltration for any self-hosted Typebot deployments and hosted services. This issue has been fixed in version 3.16.0.
Which versions are affected by CVE-2026-33712?
How do I fix CVE-2026-33712?
No fix has been published for CVE-2026-33712 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-2026-33712 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-33712 exists.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-vc2q-r6rq-ggj9.