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Vulnerability record · CVE-2026-34207 · published 22 May 2026

CVE-2026-34207: Improper input validation vulnerability

TypeBot is a chatbot builder tool. In versions prior to 3.16.0, SSRF protection for Webhook / HTTP Request blocks validates only the URL string, blocked hostname literals, and literal IP formats. It does not resolve DNS before allowing the request. As a result, a hostname such as ssrf-repro.example that resolves to 127.0.0.1, 169.254.169.254, or RFC1918/private space passes validation and is later fetched by the backend HTTP client. This enables server-side request forgery to loopback, cloud metadata, and private network targets. This issue has been resolved in version 3.16.0.

7.6 CVSS 3.1 High EPSS 0.42% · top 66.8% CWE-20 · Improper input validationCWE-918 · Server-side request forgery (SSRF) Deferred
7.6CVSS 3.1 base score
0.42%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
4References
23 Jul 2026Last modified by NVD

Description

TypeBot is a chatbot builder tool. In versions prior to 3.16.0, SSRF protection for Webhook / HTTP Request blocks validates only the URL string, blocked hostname literals, and literal IP formats. It does not resolve DNS before allowing the request. As a result, a hostname such as ssrf-repro.example that resolves to 127.0.0.1, 169.254.169.254, or RFC1918/private space passes validation and is later fetched by the backend HTTP client. This enables server-side request forgery to loopback, cloud metadata, and private network targets. This issue has been resolved in version 3.16.0.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L

References

LinkTags
https://github.com/baptisteArno/typebot.io/commit/23818bb0e54db23c456ee3fa6b12d82b2af848b8
https://github.com/baptisteArno/typebot.io/releases/tag/v3.16.0
https://github.com/baptisteArno/typebot.io/security/advisories/GHSA-grcc-6x37-wwgp
https://github.com/baptisteArno/typebot.io/security/advisories/GHSA-grcc-6x37-wwgp

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Source: NIST National Vulnerability Database (record CVE-2026-34207), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.