PatchSiren cyber security CVE debrief
CVE-2026-33712 baptisteArno CVE debrief
CVE-2026-33712 is a critical Server-Side Request Forgery (SSRF) vulnerability in Typebot, a chatbot builder tool. Versions 3.15.2 and prior are affected. The vulnerability allows unauthenticated users to achieve SSRF by supplying a custom typebot definition with server-side code blocks. This issue has been fixed in version 3.16.0. Self-hosted Typebot deployments and hosted services are potentially impacted by this critical SSRF vulnerability. Users of Typebot versions 3.15.2 and prior should upgrade to version 3.16.0 or apply compensating controls to mitigate the risk of cloud credential theft, internal network access, and data exfiltration. Evidence limits suggest verifying affected product deployments exist in managed environments and assigning an owner for follow-up. Limited information is available about the vulnerability's impact and affected scope.
- Vendor
- baptisteArno
- Product
- typebot.io
- CVSS
- CRITICAL 10
- CISA KEV
- Not listed in stored evidence
- Original CVE published
- 2026-05-22
- Original CVE updated
- 2026-07-23
- Advisory published
- 2026-05-22
- Advisory updated
- 2026-07-23
Who should care
Self-hosted Typebot deployments and hosted services are potentially impacted by this critical SSRF vulnerability. Users of Typebot versions 3.15.2 and prior should upgrade to version 3.16.0 or apply compensating controls to mitigate the risk of cloud credential theft, internal network access, and data exfiltration.
Technical summary
The preview chat endpoint (POST /api/v1/typebots/{typebotId}/preview/startChat) in Typebot versions 3.15.2 and prior allows unauthenticated users to achieve 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.
Defensive priority
High
Recommended defensive actions
- Upgrade to Typebot version 3.16.0 or later
- Implement compensating controls to restrict outgoing requests
- Monitor for suspicious activity
- Inventory and audit Typebot deployments
- Apply network access controls
Evidence notes
The CVE record was published on 2026-05-22T17:16:46.533Z and has been modified since then. The NVD entry is currently Deferred. Limited information is available about the vulnerability's impact and affected scope. Self-hosted Typebot deployments and hosted services are potentially impacted by this critical SSRF vulnerability. Users of Typebot versions 3.15.2 and prior should upgrade to version 3.16.0 or apply compensating controls to mitigate the risk of cloud credential theft, internal network access, and data exfiltration. Evidence limits suggest verifying affected product deployments exist in managed environments and assigning an owner for follow-up.
Official resources
AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-05-22T17:16:46.533Z and has not been modified since then. The NVD entry is currently Deferred.