Is Cursor safe?
Cursor is the dominant AI-pair-coding IDE. The April 2026 Bitwarden CLI hijack specifically hunted Cursor credentials. Honest verdict: safe with .gitignore + .npmignore discipline; default config has known leak vectors.
Cursor (Anysphere) reached 25.49M monthly visits per Semrush March 2026. Safe to use IF you keep `.cursor/` out of git + npm publish artifacts; UNSAFE in default config because the dot-directory captures inline keys + the April 2026 Bitwarden CLI hijack actively hunted these paths.
How it fails in production
Inline API keys in `.cursor/` config
Cursor settings.json + .cursorrules files sometimes capture API keys for non-default providers. April 2026 Bitwarden malware specifically searched these.
Generated code carries 92% bug rate on auth
April 2026 research: 92% of AI-generated auth code has at least one bug. Cursor's autocomplete + agent mode produce code at scale → bugs ship at scale.
Agent-mode blast radius
Cursor agent mode executes operations without per-step approval. Prod-credential access = SaaStr-Lemkin-class disaster surface.
How to ship safely on Cursor
- Add `.cursor/` to .gitignore + .npmignore on every project
- Run gitleaks pre-commit hook with custom Anthropic + OpenAI patterns
- Cursor agent mode: separate dev credentials from prod
- Securie's GitHub App reviews every Cursor-edited PR
Securie's secret_scanner specialist's live_validate step catches `.cursor/` directory inclusion; AuthAuthz/BOLA specialist catches dynamic-route ownership-check bugs; agent-scope crate enforces compile-time guards on Cursor agent destructive operations.
Verdict
Cursor is safe with discipline (.gitignore + agent-scope + Securie review). Default config is not — the April 2026 Bitwarden hijack targeted exactly the dot-directory pattern Cursor creates. Treat `.cursor/` as `.env`-equivalent.