Cline vs Cursor Security
Cline and Cursor are both popular AI coding tools, but they sit on opposite ends of the trust model. Cursor is a closed-source VS Code fork that processes your code through its own cloud infrastructure, with SOC 2 Type II certification and a Privacy Mode for teams that need it. Cline is a free, open-source VS Code extension (Apache 2.0) where you bring your own API key and your code goes directly to whichever model provider you choose, Anthropic, OpenAI, or a local model, with no vendor in between. Neither tool guarantees the code it writes is secure.
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The Verdict
Cline's open-source, bring-your-own-key model means there's no third party sitting between your code and the model provider, which matters if you don't trust Cursor's infrastructure specifically. But that same design shifts the responsibility for reviewing auto-approve settings and provider-level data policies entirely onto you. Cursor trades some of that transparency for built-in guardrails: approval prompts by default, SOC 2 certification, and a privacy mode you can turn on without configuring anything.
If you want full visibility into what the tool is doing and are comfortable managing your own API key and model provider choice, Cline's open-source model gives you that control, just review your auto-approve settings carefully before enabling them. If you want built-in enterprise controls and don't want to think about provider-level privacy policies, Cursor's certifications and default approval prompts are the safer starting point. Either way, the code both tools generate still needs review, and the deployed app still needs a security scan before launch.
Industry Security Context
When comparing Cline vs Cursor, consider these broader security trends.
of Lovable applications (170 out of 1,645) had exposed user data in the CVE-2025-48757 incident
Source: CVE-2025-48757 security advisory
of data breaches involve databases with misconfigured access controls
Source: Verizon Data Breach Investigations Report
average cost of a data breach in 2023
Source: IBM Cost of a Data Breach Report 2023
“Vibe coding your way to a production codebase is clearly risky. Most of the work we do as software engineers involves evolving existing systems, where the quality and understandability of the underlying code is crucial.”
Using Cline or Cursor?
Regardless of which platform you choose, vas scans for security issues specific to your stack.
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Is Cline safe to use?
Cline itself is open source and auditable, which reduces the risk of hidden data collection in the tool. The bigger risk is configuration: Cline's auto-approve settings can let it run terminal commands, install packages, and edit files without you reviewing each action first. Start with auto-approve off, review what it wants to do, and only relax those settings for actions you fully trust.
Does Cline send my code anywhere?
Cline sends your code and project context to whichever model provider you've configured with your API key, for example Anthropic or OpenAI. There's no Cline-operated server in between. That means your privacy posture depends on the model provider's data policy, not on Cline. If you use a local model, code never leaves your machine.
Cline vs Cursor for private codebases?
For private or regulated codebases, Cline lets you choose a provider with a data policy you already trust, or run a local model entirely offline, which Cursor cannot do. Cursor's advantage is that its Privacy Mode and SOC 2 certification are built in and don't require you to evaluate a separate provider's terms. Neither option eliminates the need to review what leaves your machine.
Which is safer for work use?
For teams that need SSO, audit trails, and a vendor with formal compliance certifications, Cursor is generally the easier fit for work environments. For teams that need full control over which model processes their code, or that already have a vetted relationship with a specific AI provider, Cline's bring-your-own-key model can be the better fit. In both cases, lock down auto-approve or agent permissions before using either tool on production code.