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Vulnerability record · CVE-2026-39968 · published 22 May 2026

CVE-2026-39968: Improper access control vulnerability

TypeBot is a chatbot builder tool. In versions 3.15.2 and prior, the fix for GHSA-4xc5-wfwc-jw47 ("Credential Theft via Client-Side Script Execution and API Authorization Bypass") is incomplete. While the builder's getCredentials tRPC endpoint was patched with workspace membership checks, the bot-engine runtime still allows any authenticated user to use credentials from any workspace via the preview chat endpoint. The bot-engine's getCredentials() utility function uses a falsy check (if (workspaceId && ...)) for workspace ownership validation. Since the preview endpoint accepts a client-controlled workspaceId field and the Zod schema allows empty strings, an attacker can supply workspaceId: "" to bypass credential ownership verification entirely. Exploitation can result in credential exfiltration, external service abuse, financial damage and a data breach.

7.1 CVSS 3.1 High EPSS 0.44% · top 64.5% CWE-284 · Improper access controlCWE-522 · Insufficiently protected credentials Deferred
7.1CVSS 3.1 base score
0.44%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 3.15.2 and prior, the fix for GHSA-4xc5-wfwc-jw47 ("Credential Theft via Client-Side Script Execution and API Authorization Bypass") is incomplete. While the builder's getCredentials tRPC endpoint was patched with workspace membership checks, the bot-engine runtime still allows any authenticated user to use credentials from any workspace via the preview chat endpoint. The bot-engine's getCredentials() utility function uses a falsy check (if (workspaceId && ...)) for workspace ownership validation. Since the preview endpoint accepts a client-controlled workspaceId field and the Zod schema allows empty strings, an attacker can supply workspaceId: "" to bypass credential ownership verification entirely. Exploitation can result in credential exfiltration, external service abuse, financial damage and a data breach.

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

References

LinkTags
https://github.com/baptisteArno/typebot.io/commit/d96f572e6099c5f622c05ba7b8634e6477dcf052
https://github.com/baptisteArno/typebot.io/releases/tag/v3.16.0
https://github.com/baptisteArno/typebot.io/security/advisories/GHSA-cq66-9cwr-x8jr
https://github.com/baptisteArno/typebot.io/security/advisories/GHSA-cq66-9cwr-x8jr

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Source: NIST National Vulnerability Database (record CVE-2026-39968), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.