CVE-2026-19875 Unauthenticated Registration POST Endpoint Permits Admin Email Overwrite and Outbound Relay Abuse in Langflow

IBM Langflow OSS 1.0.0 through 1.10.0 could allow a remote attacker to overwrite administrator email information and abuse the server as an outbound relay due to missing authentication for the registration endpoint...

CVE-2026-19875

IBM Langflow OSS 1.0.0 through 1.10.0 could allow a remote attacker to overwrite administrator email information and abuse the server as an outbound relay due to missing authentication for the registration endpoint...

Security Bulletin: Unauthenticated Registration POST Endpoint Permits Admin Email Overwrite and Outbound Relay Abuse in Langflow

Summary The POST /api/v2/registration/ endpoint in affected versions lacked authentication requirements, allowing unauthenticated attackers to overwrite the server's registered admin email address and trigger outbound telemetry calls to external servers, enabling the Langflow instance to be abuse...