Cursor IDE is completely down

[art_m]

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

Was working fine right up until the latest update to 2.6.11. Symptom: “Taking longer than expected”. All chats, all agents. Looks like the network is hosed in some way or another. Everything else on my machine works fine.

Cursor Network Diagnostic Results

FAILED (7): DNS, HTTP/2, SSL, Authentication UI, Cursor Tab, Agent Endpoint, Codebase Indexing

DNS: Error: No response
Logs:
[2026-03-04T04:48:11.716Z] Error: Error: No response
[2026-03-04T04:48:11.723Z] Error: Error: No response
[2026-03-04T04:48:11.723Z] Error: Error: No response
[2026-03-04T04:48:11.723Z] Error: Error: No response
[2026-03-04T04:48:11.723Z] Error: Error: No response
[2026-03-04T04:48:11.723Z] Error: Error: No response
[2026-03-04T04:48:11.723Z] Error: Error: No response
[2026-03-04T04:48:11.723Z] Error: Error: No response
[2026-03-04T04:48:11.723Z] Result: Error: No response

HTTP/2: Error: No response
Logs:
[2026-03-04T04:48:11.715Z] Start

SSL: Error: No provider

API: Not run

Ping: Not run

Chat: Not run

Agent: Not run

Marketplace: Success
Logs:
[2026-03-04T04:48:11.703Z] Host: marketplace.cursorapi.com
[2026-03-04T04:48:11.859Z] Response in 156ms
[2026-03-04T04:48:11.859Z] Response: 200
[2026-03-04T04:48:11.859Z] Response Type: cors
[2026-03-04T04:48:11.859Z] Server: null
[2026-03-04T04:48:11.859Z] Result: OK in 156ms

Authentication: Success
Logs:
[2026-03-04T04:48:11.706Z] Host: prod.authentication.cursor.sh
[2026-03-04T04:48:12.012Z] Response: 200 in 306ms

Authentication UI: Error: No response from DNS lookup
Logs:
[2026-03-04T04:48:11.716Z] DNS lookup: authenticator.cursor.sh
[2026-03-04T04:48:11.716Z] Error: No response

Cursor Tab: Error: No response from DNS lookup
Logs:
[2026-03-04T04:48:11.716Z] DNS lookup: api3.cursor.sh
[2026-03-04T04:48:11.717Z] Error: No response

Agent Endpoint: Error: No response from DNS lookup
Logs:
[2026-03-04T04:48:11.716Z] DNS lookup: agent.api5.cursor.sh
[2026-03-04T04:48:11.721Z] Error: No response

Codebase Indexing: Error: No response from DNS lookup
Logs:
[2026-03-04T04:48:11.716Z] DNS lookup: repo42.cursor.sh
[2026-03-04T04:48:11.722Z] Error: No response

Downloads: Success
Logs:
[2026-03-04T04:48:11.714Z] Host: downloads.cursor.com
[2026-03-04T04:48:11.871Z] Response: 403 in 157ms

CDN: Success
Logs:
[2026-03-04T04:48:11.715Z] Host: cursor-cdn.com
[2026-03-04T04:48:11.895Z] Response: 404 in 180ms

Steps to Reproduce

Attempt to use cursor

Expected Behavior

One generally expects things to work

Operating System

MacOS

Version Information

Version: 2.6.11
VSCode Version: 1.105.1
Commit: 8c95649f251a168cc4bb34c89531fae7db4bd990
Date: 2026-03-03T18:57:48.001Z
Build Type: Stable
Release Track: Default
Electron: 39.6.0
Chromium: 142.0.7444.265
Node.js: 22.22.0
V8: 14.2.231.22-electron.0
OS: Darwin arm64 25.3.0

For AI issues: which model did you use?

LL OF THEM

Does this stop you from using Cursor

Yes - Cursor is unusable

[art_m]

Not sure what all is going on with the DNS errors. I can resolve them by hand on the same machine:

% host authenticator.cursor.sh
authenticator.cursor.sh is an alias for cursor-01hqvan7j1hjev10p4n8wgaa8c-authkit.workosdns.com.
cursor-01hqvan7j1hjev10p4n8wgaa8c-authkit.workosdns.com is an alias for cname.workos-dns.com.
cname.workos-dns.com has address 172.64.152.23
cname.workos-dns.com has address 104.18.35.233
cname.workos-dns.com has IPv6 address 2a06:98c1:3103::6812:23e9
cname.workos-dns.com has IPv6 address 2606:4700:440b::ac40:9817
% host api3.cursor.sh
api3.cursor.sh is an alias for api3.cursor.sh.cdn.cloudflare.net.
api3.cursor.sh.cdn.cloudflare.net has address 104.18.18.125
api3.cursor.sh.cdn.cloudflare.net has address 104.18.19.125
api3.cursor.sh.cdn.cloudflare.net has IPv6 address 2606:4700::6812:137d
api3.cursor.sh.cdn.cloudflare.net has IPv6 address 2606:4700::6812:127d
% host agent.api5.cursor.sh
agent.api5.cursor.sh is an alias for agent.api5geo.cursor.sh.
agent.api5geo.cursor.sh is an alias for agent.api5lat.cursor.sh.
agent.api5lat.cursor.sh has address 54.153.104.1
agent.api5lat.cursor.sh has address 50.18.248.73
% host repo42.cursor.sh
repo42.cursor.sh is an alias for repo42.cursor.sh.cdn.cloudflare.net.
repo42.cursor.sh.cdn.cloudflare.net is an alias for cursor-lb-3-1690831134.us-east-1.elb.amazonaws.com.
cursor-lb-3-1690831134.us-east-1.elb.amazonaws.com has address 52.22.224.183
cursor-lb-3-1690831134.us-east-1.elb.amazonaws.com has address 100.51.113.220
cursor-lb-3-1690831134.us-east-1.elb.amazonaws.com has address 34.233.176.6
cursor-lb-3-1690831134.us-east-1.elb.amazonaws.com has address 34.233.62.252
cursor-lb-3-1690831134.us-east-1.elb.amazonaws.com has address 52.20.34.251
cursor-lb-3-1690831134.us-east-1.elb.amazonaws.com has address 18.211.177.135
cursor-lb-3-1690831134.us-east-1.elb.amazonaws.com has address 44.209.131.165
cursor-lb-3-1690831134.us-east-1.elb.amazonaws.com has address 3.218.9.216

[condor (Condor (Tee))]

hi @art_m and sorry to hear about your issue.

I am using also macOS with 2.6.11 but can not reproduce this error as it seems to be related to your local network / DNS resolution.

Usually there are a few common options that help:

• Restart mDNS: sudo killall -HUP mDNSResponder
• Cursor restart
• OS restart
• Try other network connection