CVE-2026-33760

The record

Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.9.0, Langflow's /api/v1/monitor router exposes 7 endpoints that perform read, write, and delete operations on user-owned resources — messages, sessions, build artifacts, and LLM transaction logs — without verifying that the authenticated requester owns the targeted resource. Any authenticated user can read, modify, rename, or permanently delete another user's data by supplying the target's resource ID or flow_id. This is a classic IDOR/BOLA vulnerability. Notably, the same source file (monitor.py) contains one correctly-implemented endpoint that uses an ownership check, demonstrating the correct pattern was known but inconsistently applied. This vulnerability is fixed in 1.9.0.

Affected packages

Related vulnerabilities

• CVE-2026-13319 GitLab has remediated an issue in GitLab CE/EE affecting all versions from 15.10 before… CWE-639
• CVE-2026-111767 MCP TypeScript SDK is the official TypeScript SDK for Model Context Protocol servers and… CWE-639
• CVE-2026-105755 vLLM is an inference and serving engine for large language models. CWE-639
• CVE-2026-105754 vLLM is an inference and serving engine for large language models. CWE-639
• CVE-2026-62140 Unauthenticated Insecure Direct Object References (IDOR) in Quiz And Survey Master <=… CWE-639
• CVE-2026-62134 Contributor Insecure Direct Object References (IDOR) in Starter Templates <= 4.7.5… CWE-639
• CVE-2026-62113 Contributor Insecure Direct Object References (IDOR) in Slim SEO <= 4.10.0 versions. CWE-639
• CVE-2026-89264 MoguBlog through 6.2 fails to validate the comment author identity in the POST… CWE-639