Subresource Integrity Scanner
Checks for missing SRI on external scripts and stylesheets.
What is Subresource Integrity?
Subresource Integrity (SRI) allows browsers to verify that external resources (scripts, stylesheets from CDNs) haven't been modified. Without SRI, if a CDN is compromised, attackers can inject malicious code into your site through the compromised files.
Why is This Important?
CDN compromises and supply chain attacks are increasing. Without SRI, you're trusting third-party CDNs completely. A single compromised jQuery or analytics file on a CDN could affect thousands of sites loading that resource.
How It Works
1. Web Crawling
Intelligent crawling discovers all endpoints, forms, parameters, and dynamic content across your web application.
2. Payload Injection
AI-powered payloads test each input vector for web vulnerabilities with context-aware attack patterns.
3. Response Analysis
Advanced analysis detects vulnerability signatures in responses, confirming exploitability with proof-of-concept.
Key Capabilities
Industry-leading web security testing powered by AI, trusted by security teams worldwide for accurate vulnerability detection.
- Deep web crawling with JavaScript rendering support
- Context-aware payload generation for each parameter
- False positive elimination through response analysis
- OWASP Top 10 and CWE compliance mapping
- Seamless CI/CD and DevSecOps integration
Frequently Asked Questions
How does SRI work?
You add an integrity attribute with a cryptographic hash of the file. The browser calculates the hash of the downloaded file and blocks execution if it doesn't match.
What if the CDN updates the file?
This is actually a feature—you want to know when files change. For legitimate updates, you update your SRI hashes after verifying the new version.
Does SRI work with CORS?
Yes, but the resource must be served with appropriate CORS headers (Access-Control-Allow-Origin) for cross-origin requests with integrity checking.
Should I use SRI for first-party resources?
Generally not necessary since you control those resources. SRI is most valuable for third-party resources you don't control.
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