CVE-2026-17627

IBM Langflow OSS versions 1.0.0 through 1.10.2 are affected by an improper authorization flaw (CWE-639) in the voice-mode WebSocket endpoint . The endpoint authenticates the connecting user and validates the presence of a personal OpenAI API key, but performs no authorization check to verify the ...

Security Bulletin: Cross-Tenant API Key Reuse and Billing Fraud in Langflow Voice Mode Subsystem

Summary The voice mode subsystem src/backend/base/langflow/api/v1/voicemode.py contains two critical vulnerabilities that enable cross-tenant API key reuse and billing fraud. The first vulnerability involves a process-global ElevenLabs client singleton that caches the first user's API key and...

EUVD-2026-40403

IBM Langflow OSS 1.0.0 through 1.10.0 voice mode contains improper shared-state handling that allows reuse of API clients across tenant boundaries. An authenticated attacker can manipulate cache state to cause requests from other users to be processed using incorrect upstream API credentials,...

CVE-2026-10140 Cross-Tenant API Key Reuse and Billing Fraud in Langflow Voice Mode Subsystem

IBM Langflow OSS 1.0.0 through 1.10.0 voice mode contains improper shared-state handling that allows reuse of API clients across tenant boundaries. An authenticated attacker can manipulate cache state to cause requests from other users to be processed using incorrect upstream API credentials,...

PT-2026-53957

Name of the Vulnerable Software and Affected Versions IBM Langflow OSS versions 1.0.0 through 1.10.0 Description The voice mode contains improper shared-state handling, which allows API clients to be reused across tenant boundaries. An authenticated attacker can manipulate the cache state, causin...