CVE-2026-33309 (GCVE-0-2026-33309)
Vulnerability from cvelistv5
Published
2026-03-24 12:49
Modified
2026-03-25 03:55
Severity ?
CWE
  • CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
  • CWE-73 - External Control of File Name or Path
  • CWE-94 - Improper Control of Generation of Code ('Code Injection')
  • CWE-284 - Improper Access Control
Summary
Langflow is a tool for building and deploying AI-powered agents and workflows. Versions 1.2.0 through 1.8.1 have a bypass of the patch for CVE-2025-68478 (External Control of File Name), leading to the root architectural issue within `LocalStorageService` remaining unresolved. Because the underlying storage layer lacks boundary containment checks, the system relies entirely on the HTTP-layer `ValidatedFileName` dependency. This defense-in-depth failure leaves the `POST /api/v2/files/` endpoint vulnerable to Arbitrary File Write. The multipart upload filename bypasses the path-parameter guard, allowing authenticated attackers to write files anywhere on the host system, leading to Remote Code Execution (RCE). Version 1.9.0 contains an updated fix.
Impacted products
Vendor Product Version
langflow-ai langflow Version: >= 1.2.0, < 1.9.0
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Show details on NVD website


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