Where does the bug appear (feature/product)? Cursor IDE Describe the Bug It started occurring about 4–5 days ago. When I edit a file containing Korean characters that is encoded in EUC-KR through the Agent, it is immediately converted to UTF-8. All Korean text in the code becomes garbled, and even if I perform an Undo on the edit result, the encoding is not restored. This happens regardless of the AI model being used, and it occurs consistently in all cases. After that, Even if [Undo File], the encoding does not revert to the original. Even if select [Undo File], the file has already been saved in UTF-8, so when reopened, it appears corrupted. Even if [Reopen with Encoding], it still appears corrupted. All MCP features from the cursor have been disabled at the cursor position. It is in Agent mode. The same occurs regardless of which model selected. I’ve seen a few similar inquiries, but the solutions provided in those posts do not resolve the issue. Attached Images are #1. Before Using Agent #2. After Using Agent #3. After Using Agent and Undo File #4. After Using Agent and Reopen with Encoding Steps to Reproduce Opening a file encoded in EUC-KR Ask to Agent : change “Sweden” to “France” Expected Behavior The file encoding must not be changed. Korean characters must not become corrupted. Screenshots / Screen Recordings [5454.png] Operating System MacOS Current Cursor Version (Menu → About Cursor → Copy) +I updated the cursor a little while ago, and the same error keeps appearing. (2026-01-22, 5 PM KST) Version: 2.4.20 VSCode Version: 1.105.1 Commit: 20b56586b0785b8843487045393c57c6d89b7100 Date: 2026-01-22T07:38:04.757Z Build Type: Stable Release Track: Early Access Electron: 39.2.7 Chromium: 142.0.7444.235 Node.js: 22.21.1 V8: 14.2.231.21-electron.0 OS: Darwin arm64 25.2.0 For AI issues: which model did you use? Composer, GPT 5.2 Sonnet 4.5 For AI issues: add Request ID with privacy disabled Request ID : 8617561c-a96f-42b9-9fd4-5004aea51d8d Does this stop you from using Cursor Yes - Cursor is unusable

I’m experiencing the same issue with Windows-1252–encoded files. Any edit made by the agent automatically converts them to UTF-8.

Hey, thanks for the report. This is a known encoding issue when editing via Agent. The team is aware. I added your report for EUC-KR files to increase visibility. Related threads: Cursor returns UTF-8 code despite Windows-1252 configuration (VB6/Windows-1252), Cursor changes encoding of source code file (C#/Central European) Temporary workaround: After editing with Agent: bottom right corner of the editor → click the encoding → “Reopen with Encoding” → EUC-KR (to see the original) Then “Save with Encoding” → EUC-KR Or try CTRL+K (inline edit) instead of Agent. It might break the encoding less, but it’s not guaranteed. @CarlosCarvalho same situation on your side. The workaround above should help for now.

Hey all! Happy to report that this should be fixed when 2.5 comes out.

That seems too far off. I’ve been sticking with version 2.3.41 because of this issue and have had to give up on version 2.4 entirely. I’m really hoping version 2.5 gets released sooner rather than later.

Moving the conversation over here: [image] Cursor AI edits corrupt Windows-1252 encoding in C++ projects (even when editor shows 1252) Bug Reports Hey, thanks for the report. This is a known issue. AI edits convert non-UTF-8 files to UTF-8 when saving. A few threads on the same topic: Windows-1252 corruption in C++ search_replace tool corrupts ANSI/Windows-1252 Inline edits break encoding in legacy project There was a fix in 2.5, but based on user reports it did not fully solve the issue. I’ll pass to the team that the bug is still reproducible on 2.5.26 with Windows-1250 encoding. Unfortunately, there is no reliable workaround yet. f…

Encoding changing when editing EUC-KR files

Support Bug Reports

Colin (Colin) March 3, 2026, 9:28pm 10

Moving the conversation over here:

Topic		Replies	Views
Issue with Agent Corrupting Korean Characters (EUC-KR Encoding) during Auto-Edits Bug Reports review	4	242	January 29, 2026
Tool behavior issues when processing EUC-KR files and saving in Korean Bug Reports windows	1	92	February 22, 2026
Cursor AI edits corrupt Windows-1252 encoding in C++ projects (even when editor shows 1252) Bug Reports inline-edit , review , windows , c-cpp	74	2426	October 7, 2026
It’s about the Chinese garbled text issue in the source code generated by the Cursor editor, can you take a look and fix it? Bug Reports windows	4	251	June 8, 2026
Agent Write/StrReplace tools output GBK-encoded files on Chinese Windows — persists in 3.0.13 even after ACP changed to 65001 Bug Reports windows	9	704	June 8, 2026

Encoding changing when editing EUC-KR files

Related topics