CVE-2026-55446

Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.0.19, an attacker can send a /api/v1/files/upload/ request without any authentication token/cookies and abuse a very long multipart form boundary to make the langflow app unusable for all users for an indefinite amount of time. This vulnerability is fixed in 1.0.19.

• CWE-400

• https://github.com/langflow-ai/langflow/pull/3923Issue Tracking, Patch
• https://github.com/langflow-ai/langflow/security/advisories/GHSA-qwqc-p3q8-wcg9Exploit, Patch, Vendor Advisory
• https://github.com/langflow-ai/langflow/security/advisories/GHSA-qwqc-p3q8-wcg9Exploit, Patch, Vendor Advisory

Published

Jun 23, 2026

Last Modified

Oct 25, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2026-55440Microsoft UFO open-source framework for intelligent automati…6.5
• CVE-2026-55441mise manages dev tools like node, python, cmake, and terrafo…8.6
• CVE-2026-55442The Goobi viewer is a web application that allows digitised …5.3
• CVE-2026-55443LangChain is a framework for building agents and LLM-powered…5.5
• CVE-2026-55444The Goobi viewer is a web application that allows digitised …5.3
• CVE-2026-55445Qinglong is a timed task management platform supporting Pyth…9.3
• CVE-2026-55447Langflow is a tool for building and deploying AI-powered age…9.6
• CVE-2026-55448mise manages dev tools like node, python, cmake, and terrafo…6.3
• CVE-2026-55449CloudBeaver is a cloud database manager. Prior to 26.1.2, it…5.3
• CVE-2026-5545libcurl might in some circumstances reuse the wrong connecti…6.5
• CVE-2026-55450Langflow is a tool for building and deploying AI-powered age…9.3
• CVE-2026-55451gettext-converter provides gettext resource conversion utili…8.3