CVE-2026-17627 Langflow is affected by improper authorization due to missing access control on the voice-mode WebSocket endpoint

IBM Langflow OSS 1.0.0 through 1.10.2 could allow a remote authenticated attacker to obtain sensitive information and inject messages into workflow history due to improper authorization...

CVE-2026-17627

IBM Langflow OSS (versions 1.0.0–1.10.2) is affected by an improper authorization flaw (CWE-639) in its voice-mode WebSocket endpoint . The endpoint authenticates the connecting user but performs no check to verify that the user is permitted to access the specified flow identifier. In a multi-use...

Security Bulletin: Langflow is affected by improper authorization due to missing access control on the voice-mode WebSocket endpoint

Summary Langflow provides a voice-mode feature through a WebSocket API endpoint that accepts a flow identifier as a URL path parameter and uses it to retrieve the target flow description and persist conversation messages against that flow. The endpoint authenticates the connecting user's identity...

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,...

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...