HTTP2 dont work at all HTTP1.1 lagging

Bug Reports
1

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

In 2.1.47-48 HTTP2 stopped working and resorted to 1.1 which is slow but stable. 2.1.49 - HTTP2 worked again and 2.1.50 - HTTP2 does not work again and HTTP1.1 chokes often. I tried different connections and it did not help.

Steps to Reproduce

Hard to say

Screenshots / Screen Recordings

Screenshot 2025-12-10 at 12.15.20.png
Screenshot 2025-12-10 at 12.15.20.png2880×1558 294 KB

Operating System

MacOS

Current Cursor Version (Menu → About Cursor → Copy)

Version: 2.1.50 (Universal)
VSCode Version: 1.105.1
Commit: 56f0a83df8e9eb48585fcc4858a9440db4cc7770
Date: 2025-12-06T23:39:52.834Z
Electron: 37.7.0
Chromium: 138.0.7204.251
Node.js: 22.20.0
V8: 13.8.258.32-electron.0
OS: Darwin arm64 25.1.0

For AI issues: which model did you use?

all models behaves the same for this isue

For AI issues: add Request ID with privacy disabled

Request ID: 954552f8-622a-4915-9450-46c355b58386
ConnectError: [internal] 1185413486912:error:10000410:SSL routines:OPENSSL_internal:SSLV3_ALERT_HANDSHAKE_FAILURE:../../third_party/boringssl/src/ssl/tls_record.cc:486:SSL alert number 40

at nsu.$streamAiConnect (vscode-file://vscode-app/Applications/Cursor.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:6409:406134)
at async vscode-file://vscode-app/Applications/Cursor.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:565:80832
at async Object.run (vscode-file://vscode-app/Applications/Cursor.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:6477:42602)
at async o (vscode-file://vscode-app/Applications/Cursor.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:2815:1269)
at async Promise.allSettled (index 0)
at async fHr.run (vscode-file://vscode-app/Applications/Cursor.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:2815:6519)

Does this stop you from using Cursor

Yes - Cursor is unusable

3 Likes
2

This is the same issue I’m having. I assume something happened specifically for Ukraine because a couple of my friends are facing the same issue. Please help, http1 is really slow and has a bad experience compared to http2

2 Likes
3

I am also working from Ukraine and local internet issue was my first suspect but .49 update fixed the issue. I suppose Cursor can help from their end.

4

Hey, thanks for the report. Looks like the same issue as here: SSLV3_ALERT_HANDSHAKE_FAILURE when creating new chat. Most users fix it temporarily by disabling HTTP/2:

  • Settings → search for HTTP/2 → enable Disable HTTP/2 or in Network set HTTP Compatibility Mode to HTTP/1.1, then restart Cursor

We’re investigating it as a regression in 2.1.50. I’ll update you once there’s a fix.

3 Likes
5

(duplicate my message for better visibility):

My observation

6

I’m also from Ukraine and have the same issue.

Working with HTTP/1.1 seems to be slower and produces worse quality of code.

2 Likes
7

Thanks for getting back! HTTP1.1 does not work, it breaks in the middle so Cursor literally out of order. I just wanted to make it clear.

1 Like
8

Same issue here, i build my own VMs and i thought this has something to do with firewall or it’s a dns problem, AI chat features is not working when connected via ssh, and it was working a few hours ago, is there someone else in north Africa have same issue?

10

No mate, it is not about geography. I also enjoyed working SSH all day until it stopped working again at night. Cursor can fix it. Based in Ukraine.