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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.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-33712 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-33712

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-33712 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-33712

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.