Write permission bug

Support Bug Reports
1

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

When I switch accounts, mostly rules files (mdc) lose write permission for some reason, I think restarting cursor or computer works, but please fix it

Steps to Reproduce

Switch accounts, prompt cursor to change rules file

Expected Behavior

cursor should be able to write in rules file

Operating System

Windows 10/11

Current Cursor Version (Menu → About Cursor → Copy)

Version: 2.3.21 (user setup)
VSCode Version: 1.105.1
Commit: 68e0a0385b87408d050869ea543e3778ad53f780
Date: 2026-01-02T23:46:13.381Z
Electron: 37.7.0
Chromium: 138.0.7204.251
Node.js: 22.20.0
V8: 13.8.258.32-electron.0
OS: Windows_NT x64 10.0.26200

For AI issues: which model did you use?

Any

Additional Information

it feels like there is some process “holding” the file, so cursor cant change

Does this stop you from using Cursor

Sometimes - I can sometimes use Cursor

2

Hey, thanks for the report.

This looks like a known issue with file permissions for .cursor/rules/. The team is already working on a fix.

To help diagnose your specific case (related to switching accounts), could you share a bit more info:

  1. How exactly do you switch accounts? (Cursor Settings > Sign Out > Sign In with a different account?)
  2. Does it happen every time you switch, or only sometimes?
  3. Do all .mdc files lose permissions, or only specific ones?
  4. If it happens when the AI agent tries to modify a rules file, please share the Request ID (right-click the chat > Copy Request ID)

Related discussion: [BUG] AI Agent Write/StrReplace Tools Blocked on .cursor/rules/private/*.mdc Files