Netlify Security Scanner
Deploying to Netlify? Ensure your site and serverless functions are properly secured.
Enter your deployed app's URL. Review the findings, take the suggested fixes to your coding tool, and retest after making changes.
First scan free: issue counts and one finding revealed in detail. No card required.
Netlify Security Considerations
Netlify makes development fast, but AI-generated code often skips security best practices:
- !Build-time vs runtime environment variables
- !Netlify Functions security configuration
- !Deploy preview access controls
- !Form handling security
Where Security Breaks in Netlify Apps
Built on Supabase (Postgres + RLS), Netlify applications share a recognizable fingerprint, which means attackers and automated scanners find them the same way every time. Based on real vulnerability patterns in Netlify deployments, the breakdown is 1 critical-impact issue, 0 high-impact, and 4 medium-or-lower.
Build-Time Secret Exposure
Build-time env vars get baked into static HTML, visible to anyone.
Fix: Use Netlify Functions for runtime secrets. Never build-time for secrets.
Deploy Preview Exposure
Preview deployments expose unreleased features publicly.
Fix: Password-protect deploy previews in Site settings.
Missing _headers File
Security headers not configured by default.
Fix: Create _headers file with CSP, X-Frame-Options, HSTS.
Form Spam Without Protection
Netlify Forms are public endpoints vulnerable to spam.
Fix: Enable Akismet or reCAPTCHA on all forms.
Function Timeout Attacks
10s timeout (26s paid) can be exploited for resource exhaustion.
Fix: Add rate limiting. Set appropriate timeout limits.
What We Check
Environment Config
Review environment variable setup.
Functions Security
Check serverless function security.
Headers Setup
Verify _headers file configuration.
Form Security
Check form handling and spam protection.
What You'll Get
Why Netlify Apps Need Security Scanning
Netlify makes deploying static sites and serverless functions simple. Understanding the security implications of Netlify's features helps you deploy confidently.
vas scans your deployed Netlify site to verify security headers, check for exposed secrets, and ensure proper configuration.
How Netlify Security Scanning Works
Submit Your URL
Enter your Netlify application URL. Our scanner automatically detects your tech stack and configures the appropriate security checks for Netlify.
Automated Analysis
We check the reachable app for exposed secrets, browser protections, authentication issues and database access problems. A standard scan typically takes a few minutes; blocked requests or incomplete coverage are reported.
Get Actionable Results
Receive a detailed report with prioritized vulnerabilities, severity ratings, and step-by-step remediation guidance with code examples specific to Netlify.
Common Questions About Netlify Security
What does a VAS scan of a Netlify app check?
VAS checks the deployed pages, scripts and endpoints it can reach for issues including environment config, functions security, headers setup, form security. The report records findings and coverage limits; it does not certify the whole app as secure.
What will I receive in the report?
Findings include severity, supporting evidence and remediation guidance. Your first scan is free, with issue counts and one finding revealed in detail. Paid report access unlocks every finding. Use Export for AI to bring available findings into your coding tool, review the proposed changes and retest.
Can a scan verify every permission and private workflow?
No. Coverage depends on reachable pages, discovered endpoints and enabled checks. Configure a test login for supported authenticated checks. Review source code and business-specific permissions separately. Zero findings does not prove an app is secure.
Does VAS change my code or database policies?
VAS provides recommendations, not automatic fixes. Adapt any suggested policy or code change to your data model, test that permitted users still have access and that other users do not, then rescan. Read checks alone cannot confirm insert, update or delete permissions.
What should I know before scanning a production app?
Only scan apps you own or have permission to test. Scan requests can trigger firewall rules, logs and rate limits. Review enabled checks, and use staging or dedicated test accounts for sensitive workflows. Active tests, where enabled, need separate care because they can make changes.
Remediation Playbook for Netlify
Priority-ordered fixes for the specific findings we see in Netlify apps. Critical items close data-exposure gaps; high items prevent compromise; medium items reduce attack surface. Applies to apps using Supabase (Postgres + RLS), the dominant Netlify stack.
1. Build-Time Secret Exposure
Why it matters: Build-time env vars get baked into static HTML, visible to anyone.
How to close it: Use Netlify Functions for runtime secrets. Never build-time for secrets.
2. Deploy Preview Exposure
Why it matters: Preview deployments expose unreleased features publicly.
How to close it: Password-protect deploy previews in Site settings.
3. Missing _headers File
Why it matters: Security headers not configured by default.
How to close it: Create _headers file with CSP, X-Frame-Options, HSTS.
4. Form Spam Without Protection
Why it matters: Netlify Forms are public endpoints vulnerable to spam.
How to close it: Enable Akismet or reCAPTCHA on all forms.
5. Function Timeout Attacks
Why it matters: 10s timeout (26s paid) can be exploited for resource exhaustion.
How to close it: Add rate limiting. Set appropriate timeout limits.
Verify the fixes stuck
Rescan after deploying a fix to check whether the original finding still appears. Compare the evidence and coverage with the previous report. For permissions and private workflows, also repeat the relevant tests with authorized and unauthorized test users.
Check your Netlify app
Find observable security issues in your deployed app, review the evidence and take the next steps with your coding tool.
Start with a free scan. See issue counts and one finding in detail, then decide whether you need full report access.
More on Netlify Security
Every angle of Netlify security, from the specific findings we detect to step-by-step fixes.
Netlify Security Risks
Specific risks we find in Netlify apps, with real-world examples.
Netlify Security Issues
Issues grouped by severity with detection and fix steps.
Netlify Best Practices
Remediation playbook derived from Netlify's actual failure modes.
Is Netlify Safe?
Honest assessment of Netlify's production readiness.
Netlify Security Checklist
Pre-launch checklist covering every finding class for Netlify.
How to Secure Netlify Apps
Step-by-step hardening guide for Netlify deployments.
Can Netlify Apps Be Hacked?
Attack vectors specific to Netlify and how they get exploited.
What People Say About Netlify Security
Community sentiment on Netlify security, compared with our scan data.
Netlify with your database
The security gaps we find depend on which database sits behind Netlify.