Langflow Langflow — CVE-2026-18894 (Critical)

Date Oct 29, 2026

Type Vendor advisory

Signal Critical vendor advisory

Vendor / Product Langflow · Langflow

CVE CVE-2026-18894

Critical vendor advisory CVE-2026-18894

Summary

IBM Langflow OSS 1.0.0 through 1.12.4 could allow a remote attacker to trigger pre-existing stored Python component code in a public workflow, executing it under the flow owner's runtime context within the server process. This bypasses the intended trust boundary where public execution paths are restricted to server-trusted component code.

Why it matters

This CVE carries a CRITICAL severity rating (CVSS 6.5) in Langflow Langflow. Patch or mitigate promptly. EPSS percentile: 42%.

Operator check

Review CVE-2026-18894 in your asset inventory. Apply patches per vendor guidance and verify Langflow is not exposed. CVSS score: 6.5. EPSS probability: 0.5%; percentile: 42%.

Sources

NVD — CVE-2026-18894 Source reference

PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.

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