Where does the bug appear (feature/product)? Cursor IDE Describe the Bug Starting around 5 days ago I noticed many hundreds of thousands of oauth dynamic client registrations coming from cursor across different customers. I opened cursor locally and did not see this behavior. I then updated my own…

Hey, thanks for the report. This is a known race condition and it’s already escalated to engineering. Your report confirms it affects macOS too, not just Windows. Another user had to disable Cursor in their DCR flow due to thousands of registrations. To help us prioritize a fix, could you share: …

I’ve seen over 670,000 registrations since the problem started (so averaging more than 100K per day), pretty much all due to this issue (daily registrations from next most popular MCP client is less than 100). Our MCP server is in use by ~100 companies including many large fortune 500s - based on l…

Yup, the exact same thing is happening for us as well. Started happening since the 2.0 release.

This is the kind of problem that would impact enterprise-level MCP builders the most. If this is not fixed, people who are using Cursor seriously for enterprise use cases won’t enjoy the experience. Can someone from Cursor team help here?

Cursor Creating Hundreds of Thousands of MCP Oauth Clients

Support Bug Reports

btiernay (Bobby Tiernay) December 1, 2025, 3:43pm 6

+1 as well. We are seeing hundreds of thousands of clients being generated in very short time frame.

Topic		Replies	Views
MCP OAuth: persist DCR client_id across reconnects (avoid AS-side registration spam) Bug Reports mcp , login	7	292	August 22, 2026
OAuth Code Flow with Cursor in MCP Server Without Dynamic Client Registration Help	1	1282	July 10, 2025
Multiple MCP OAuth call Bug Reports	3	154	December 17, 2025
MCP Server Regression - MCP OAuth registration fails Bug Reports mcp	1	371	May 7, 2026
MCP Server Race Condition Causes Infinite Process Spawning on Windows (Cursor 2.0.34) Bug Reports	6	399	December 1, 2025

Cursor Creating Hundreds of Thousands of MCP Oauth Clients

Related topics