CVE-2026-33309 - Langflow has an Arbitrary File Write (RCE) via v2 API

CVE-2026-33309 - Langflow has an Arbitrary File Write (RCE) via v2 API

https://cvefeed.io/rssfeed/latest.atom / Tue, 03/24/2026 - 14:08
CVE ID :CVE-2026-33309
Published : March 24, 2026, 12:49 p.m. | 13 minutes ago
Description :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.
Severity: 0.0 | NA
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