There are two worries hiding in this question, and they have different answers. Does Cursor send your .env to its AI models as context? It can, unless you exclude it. Does Cursor bake your .env into the shipped build? No, that is decided by your build configuration, not the editor. The dangerous part is the build side, because if your client code references a secret from .env, it ends up in the binary and is extractable, whether Cursor was involved or not. Here is how to think about both and keep secrets out of the build.
Short answer
Cursor does not, by itself, put your .env into the build; whether .env values end up in the binary is determined by your build configuration, not the editor. What Cursor can do is send files, potentially including .env, to its AI models as context, which you prevent with a .cursorignore file and privacy settings. The larger risk is independent of Cursor: if your client code references a secret from .env at build time, that value is embedded in the bundle and is recoverable from the binary. So keep real secrets out of client-side env vars and on your backend, exclude .env from Cursor and from git, and verify what actually shipped.
What you should know
- Cursor does not bundle .env for you: your build config decides that.
- Cursor can read .env as context: unless you exclude it with .cursorignore.
- Client env vars get embedded: a referenced secret ends up in the binary.
- Embedded secrets are extractable: bundling is not hiding.
- Keep secrets server-side: the only reliable fix for real secrets.
Does Cursor put your .env in the build?
No, not as a function of using Cursor. Whether a value from .env ends up in your compiled app depends on your framework and build configuration, specifically whether your client code reads that variable and the bundler inlines it at build time. That happens the same way whether you wrote the code by hand or with Cursor, so the editor is not what places the secret in the binary. Cursor is a code editor with AI assistance; it does not change how your bundler handles environment variables. So if a secret is in your build, the cause is that your client code references it and the build embeds it, which is a configuration issue to fix regardless of which editor you used.
Two separate risks: cloud context versus the bundle
The question really spans two issues. The table separates them.
| Risk | What happens | How to address it |
|---|---|---|
| Cursor reads .env as AI context | The file may be sent to the model | Add .env to .cursorignore and use privacy settings |
| .env referenced in client code | The value is inlined into the bundle at build | Keep secrets server-side, not in client env vars |
| .env committed to git | The secret leaks via your repository | Add .env to .gitignore |
| Secret embedded in the binary | Anyone can extract it from the app | Move it to a backend the app calls |
The cloud-context risk is about your development workflow and is solved by excluding .env from what Cursor reads. The bundle risk is about your shipped app and is the more serious one, because a secret inlined into the binary is exposed to anyone who unpacks it.
How do you keep your .env out of the build?
Stop referencing real secrets in client code, and exclude the file from tools that might capture it. First, treat any value your client app reads as public, since build-time env vars are inlined into the bundle; keep genuine secrets like API keys and tokens on your backend, and have the app call your server, which holds them. Second, add .env to .gitignore so it never reaches your repository, and to .cursorignore so Cursor does not send it to the model as context. Third, if a framework exposes a "public" env prefix, understand that those values are deliberately shipped to the client and must not hold secrets. The principle is that the build is not a safe place for a secret, so the fix is architectural, not just hiding the file.
What to watch out for
The first trap is assuming a secret is safe because it lives in .env rather than in code, when a referenced env var is inlined into the bundle just the same. The second is committing .env to git or leaving it readable by Cursor, both of which leak it before the build even matters. The third is trusting a framework's "public" env prefix with a real secret, since those are meant to ship to the client. A pre-submission scan such as PTKD.com (https://ptkd.com) reads the compiled APK, AAB, or IPA against OWASP MASVS and surfaces the strings, keys, and endpoints embedded in the build, so you can confirm whether a .env secret actually shipped in your binary, regardless of whether Cursor or your own hand wrote the code. Moving the secret to your backend is the fix.
What to take away
- Cursor does not put your
.envinto the build; your build configuration does, by inlining referenced env vars into the bundle. - Cursor can read
.envas AI context, which you prevent with.cursorignoreand privacy settings, and.gitignorekeeps it out of your repo. - A secret your client code references is embedded in the binary and is extractable, so bundling is not hiding.
- Keep real secrets on your backend, and use a pre-submission scan such as PTKD.com to confirm no
.envsecret shipped in your build.
