CVE-2026-39968
Published: 22 May 2026
Summary
CVE-2026-39968 is a high-severity Improper Access Control (CWE-284) vulnerability. Its CVSS base score is 7.1 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 18.5th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-31481
Vulnerability details
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…
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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.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Authz bypass in public preview endpoint directly enables exploitation of public-facing app (T1190) to access/exfiltrate improperly protected workspace credentials (T1552).
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Ensuring access control decisions are made and applied to every request before enforcement directly prevents improper access control by requiring policy-based checks.
Enforcing approved authorizations directly implements access control policies to block unauthorized access.
Training covers access control policies and the consequences of improper access grants or usage by users.
Documenting role-based training completion allows verification that only trained individuals receive or retain access, making improper access control harder to exploit through untrained personnel.
Documented and acknowledged rules define permitted access, reducing improper access control by establishing clear behavioral boundaries and accountability.
Disabling all system access and revoking credentials upon termination directly prevents improper access control by former personnel.
The access control policy and procedures directly mandate and enforce proper access control mechanisms across the organization.
Device lock enforces restricted access until re-authentication, directly reducing unauthorized use of active sessions.