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...

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,...