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CVE

CVE-2026-33712

TypeBot: Unauthenticated SSRF via isolated-vm fetch in preview chat endpoint bypasses SSRF controls
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CVE

CVE-2026-33712

TypeBot: Unauthenticated SSRF via isolated-vm fetch in preview chat endpoint bypasses SSRF controls

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.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
10
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
C
H
U
-

Related Resources

No items found.

References

https://github.com/baptisteArno/typebot.io/releases/tag/v3.16.0, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33712.json, https://github.com/baptisteArno/typebot.io/security/advisories/GHSA-vc2q-r6rq-ggj9, https://nvd.nist.gov/vuln/detail/CVE-2026-33712

Severity

10

CVSS Score
0
10

Basic Information

Base CVSS
10
EPSS Probability
0.00347%
EPSS Percentile
0.27933%
Introduced Version
0
Fix Available
7bc1a6f856f64c5ae38ecb6eb87a175b0a50c5c1

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