CVE-2026-23522

The record

LobeChat is an open source chat application platform. Prior to version 2.0.0-next.193, `knowledgeBase.removeFilesFromKnowledgeBase` tRPC ep allows authenticated users to delete files from any knowledge base without verifying ownership. `userId` filter in the database query is commented out, so it's enabling attackers to delete other users' KB files if they know the knowledge base ID and file ID. While the vulnerability is confirmed, practical exploitation requires knowing target's KB ID and target's file ID. These IDs are random and not easily enumerable. However, IDs may leak through shared links, logs, referrer headers and so on. Missing authorization check is a critical security flaw regardless. Users should upgrade to version 2.0.0-next.193 to receive a patch.

Affected packages

Related vulnerabilities

• GHSA-j7xp-4mg9-x28r Lobe Chat has IDOR in Knowledge Base File Removal that Allows Cross User File Deletion Same vulnerability
• GHSA-wrrr-8jcv-wjf5 LobeHub Vulnerable to Improper Authorization in Presigned Upload Also affects @lobehub/chat
• CVE-2026-23835 LobeHub is an open source human-and-AI-agent network. Also affects @lobehub/chat
• GHSA-4gpc-rhpj-9443 Lobe Chat affected by Cross-Site Scripting(XSS) that can escalate to Remote Code… Also affects @lobehub/chat
• CVE-2026-23733 LobeChat is an open source chat application platform. Also affects @lobehub/chat
• CVE-2024-32965 @lobehub/chat Server Side Request Forgery vulnerability Also affects @lobehub/chat
• CVE-2024-47066 lobe-chat implemented an insufficient fix for GHSA-mxhq-xw3g-rphc (CVE-2024-32964) Also affects @lobehub/chat
• CVE-2026-114574 A security vulnerability has been detected in massCodeIO massCode 5.10. CWE-284