IBM Langflow OSS: arbitrary file write

High8.8CVE-2026-7667 · Published Jul 17, 2026 · updated Jul 23, 2026

IBM Langflow OSS 1.0.0 through 1.10.0 allows an authenticated attacker to create a malicious flow pointing to an attacker-controlled URL that returns a specially crafted Content-Disposition header (e.g., filename="../../../target/path" ), enabling arbitrary file write operations with attacker-controlled content to any path accessible by the Langflow process.