CVE-2026-9198: IBM Langflow Code Injection Vulnerability

Critical severity, CVSS 9.8. Actively exploited: in CISA KEV since 2026-08-04. EPSS: 28.7% chance of exploitation in the next 30 days.

IBM Langflow OSS 1.0.0 through 1.10.0 allows unauthenticated attackers to chain /api/v1/auto_login (mints SUPERUSER tokens to any network caller) with /api/v1/validate/code (executes user code via exec()) to achieve full RCE on default Langflow deployments

Affected products

• Langflow Langflow: from 1.0.0, before 1.10.1 (fixed in 1.10.1)

Published 2026-07-17. Last modified 2026-08-17.