# BeaverCheck Audit Report — https://docs.rs **Date:** April 22, 2026 **URL:** https://docs.rs **Overall Grade:** B (82/100) **Report:** https://beavercheck.com/results/ef99ded1-1a13-430e-af9e-6c2b946fd1c7 ## Top Findings 1. **[CRITICAL]** No
landmark found — Accessibility > Landmark Structure 2. **[WARNING]** Cross-Origin-Embedder-Policy header is missing — Security > Security Headers 3. **[WARNING]** Cross-Origin-Opener-Policy header is missing — Security > Security Headers 4. **[WARNING]** HSTS is missing includeSubDomains — Security > Security Headers 5. **[WARNING]** No DMARC record found — Security > Email Security --- ## Lighthouse Scores | Category | Score | |----------|-------| | Performance | 91 | | Accessibility | 90 | | Best Practices | 100 | | SEO | 91 | --- ## Security ### Security Headers (F — 35/100) *2 of 10 headers properly configured* - **[WARNING]** HSTS is missing includeSubDomains — Without includeSubDomains, subdomains can still be accessed over HTTP. - **[WARNING]** X-Content-Type-Options header is missing — This header prevents MIME-type sniffing, which can lead to XSS attacks. Set it to 'nosniff'. - **[WARNING]** X-Frame-Options header is missing — This header prevents clickjacking by controlling who can embed your page in a frame. Set it to DENY or SAMEORIGIN. - **[WARNING]** Referrer-Policy header is missing — Controls how much referrer information is sent with requests. Set to 'strict-origin-when-cross-origin' or stricter. - **[WARNING]** Permissions-Policy header is missing — Controls which browser features (camera, microphone, geolocation) are allowed. Set it to restrict unused features. - **[PASS]** Content-Security-Policy is present - **[WARNING]** Cross-Origin-Opener-Policy header is missing — COOP isolates your browsing context, preventing cross-origin side-channel attacks. Set to 'same-origin'. - **[WARNING]** Cross-Origin-Embedder-Policy header is missing — COEP prevents loading cross-origin resources without explicit permission. Required for SharedArrayBuffer and high-resolution timers. - **[PASS]** X-Powered-By header is not present - **[WARNING]** Server header reveals version information — The Server header discloses the software version, aiding attackers in targeting known vulnerabilities. Remove the version number. ### Content Security Policy (B — 80/100) *6 of 10 CSP checks passed* - **[INFO]** Raw CSP policy - **[PASS]** default-src directive is set - **[PASS]** No 'unsafe-inline' in script source - **[PASS]** No 'unsafe-eval' in script source - **[PASS]** No wildcard in script source - **[PASS]** object-src falls back to default-src - **[PASS]** base-uri is properly restricted - **[WARNING]** frame-ancestors directive is missing — frame-ancestors controls who can embed your page, preventing clickjacking. Set it to 'self' or 'none'. - **[WARNING]** form-action directive is missing — form-action restricts where forms can submit data, preventing form hijacking. - **[INFO]** upgrade-insecure-requests is not set — This directive upgrades HTTP resources to HTTPS automatically, preventing mixed content. ### TLS & Certificates (A+ — 100/100) *TLS 1.3, 7 checks passed* - **[PASS]** TLS 1.3 is used - **[PASS]** Strong cipher suite is used - **[INFO]** HTTP/2 is not negotiated — HTTP/2 provides multiplexing and header compression for better performance. - **[PASS]** Certificate is valid (expires in 249 days) - **[PASS]** Certificate chain has 2 certificates - **[PASS]** Certificate uses modern signature algorithm - **[PASS]** Certificate covers 1 domain(s) - **[PASS]** Certificate is issued by a trusted CA ### Cookie Security (A+ — 100/100) *No cookies set — no cookie security risks* - **[PASS]** No cookies set — no cookie security risks --- ## Advanced Security ### Subresource Integrity (A+ — 100/100) *No external resources* - **[PASS]** No external resources to protect ### JS Library Vulnerabilities (A+ — 100/100) *No known vulnerabilities* - **[PASS]** No known JavaScript library vulnerabilities detected ### Information Leakage (A+ — 100/100) *No exposures* - **[INFO]** No security.txt found — Consider adding a security.txt at /.well-known/security.txt. - **[PASS]** No sensitive files exposed ### Email Security (F — 30/100) *No DMARC* - **[WARNING]** No DMARC record found — Without DMARC, email receivers have no policy for handling authentication failures. ### Permissions-Policy (D — 40/100) *No header set* - **[WARNING]** No Permissions-Policy header — Consider adding a Permissions-Policy header to restrict browser feature access from embedded content. ### CORS Configuration (B — 80/100) *No CORS headers* - **[PASS]** No CORS headers present — secure default --- ## Performance ### Page Weight Budget (A+ — 99/100) *536 KB transferred, 13 requests* - **[PASS]** Page weighs 681 KB (536 KB transferred) - **[INFO]** Fonts are 485 KB — consider subsetting or using system fonts — Subset fonts to include only used characters, or switch to system font stacks. - **[PASS]** 13 HTTP requests - **[INFO]** Estimated 0.11 g CO2 per page load ### Third-Party Impact (A+ — 100/100) *No third-party resources* - **[PASS]** No third-party resources detected ### Text Compression (A+ — 100/100) *All text resources are compressed* - **[PASS]** All text resources are compressed ### Image Optimization (A+ — 100/100) *No images on this page* - **[PASS]** No images on this page ### JS Execution Cost (A+ — 100/100) *407ms total JS execution* - **[INFO]** https://docs.rs/: 249ms CPU time - **[INFO]** Unattributable: 158ms CPU time - **[INFO]** Third-party scripts: 158ms (39% of total) ### Font Loading (A+ — 100/100) *4 fonts (485 KB)* - **[INFO]** 4 font(s) use font-display: swap (FOUT risk but functional) ### JS Bundles (A — 90/100) *3 scripts, 0 KB unused* - **[WARNING]** https://docs.rs/-/static/menu.js?0-0-0-9a14b3d3fb8...: unminified — 2 KB could be saved ### Resource Caching (A+ — 100/100) *All resources properly cached* - **[PASS]** No caching issues found ### Critical Rendering Path (A+ — 100/100) *No render-blocking resources* - **[PASS]** No render-blocking resources detected ### Resource Hints (A+ — 100/100) *No optimization needed* - **[PASS]** No resource hint issues ### Page Weight Inventory (A+ — 100/100) *13 resources · 536 KB · 0 KB savings available* - **[PASS]** Within 1MB page-weight target ### Render-Blocking Resources (A+ — 100/100) *No render-blocking resources detected* - **[PASS]** No render-blocking resources detected in ### Third-Party Resources (A+ — 100/100) *No third-party resources detected* --- ## Content Quality ### Links (A+ — 98/100) *40 links checked, 39 healthy, 0 broken* - **[PASS]** 39 of 40 links are healthy - **[INFO]** Long redirect chain: https://foundation.rust-lang.org/policies/priva... (3 hops) ### Mixed Content (A+ — 100/100) *No mixed content detected — all resources use HTTPS.* - **[PASS]** No mixed content detected — all resources use HTTPS ### Open Graph (F — 0/100) *No Open Graph tags found — social sharing previews will be generic.* - **[WARNING]** No Open Graph meta tags found — Without og:title, og:description, and og:image, social media platforms will generate a generic preview when your page is shared. ### Structured Data (C — 40/100) *No structured data (JSON-LD) found.* - **[INFO]** No structured data (JSON-LD) found — Adding structured data helps search engines understand your content and can enable rich results. --- ## Infrastructure ### DNS Records (A+ — 100/100) *4 A records, 33 ms lookup* - **[PASS]** Resolves to 4 IPv4 address(es) - **[PASS]** Has 4 IPv6 (AAAA) record(s) - **[PASS]** 4 nameserver(s) configured - **[PASS]** 2 mail exchanger(s) configured - **[INFO]** CAA records not checked — CAA record lookup requires a specialized DNS resolver. This check will be available in a future update. - **[PASS]** SPF record present in TXT - **[PASS]** DNS resolution time: 33 ms ### Redirect Chain (A+ — 100/100) *No redirects — direct access* - **[PASS]** No redirects — direct access ### IPv6 Readiness (F — 30/100) *IPv6 records exist but unreachable* - **[WARNING]** IPv6 DNS records exist but server is not reachable — Having AAAA records but an unreachable server is worse than no AAAA — clients may experience delays before falling back to IPv4. - **[INFO]** IPv6 connection error ### Crawlability (A+ — 100/100) *robots.txt present, sitemap with 33 URLs* - **[PASS]** robots.txt is present - **[PASS]** sitemap.xml is present - **[PASS]** sitemap.xml is valid XML - **[PASS]** sitemap.xml contains 33 entries - **[PASS]** Sitemap index with 33 child sitemaps - **[PASS]** robots.txt references sitemap ### URL Variants (A — 90/100) *www/non-www, trailing slash, HTTP→HTTPS* - **[PASS]** www/non-www redirect configured correctly (preferred: non-www) - **[WARNING]** HTTP→HTTPS redirect uses 302 instead of 301 ### Domain Intelligence (A+ — 100/100) *docs.rs — via Webglobe d.o.o., hosted on Fastly* - **[PASS]** Registrar: Webglobe d.o.o. - **[WARNING]** Registrar lock is NOT enabled — The domain can be transferred without an unlock step. Enable registrar lock (clientTransferProhibited) in your registrar's control panel to protect against unauthorized or accidental transfers. - **[PASS]** Hosting: Fastly --- ## Compliance ### WCAG Compliance (A+ — 100/100) *No testable criteria* ### Cookie Consent & Privacy (A+ — 100/100) *privacy policy found* - **[PASS]** Privacy policy link found - **[PASS]** Terms of service link found - **[INFO]** No cookie consent banner detected - **[INFO]** This is an automated check, not legal advice — BeaverCheck detects technical indicators of consent management. This does not constitute a legal compliance assessment. Consult a privacy professional for GDPR/CCPA compliance. ### Language & i18n (A — 90/100) *Lang attribute present* - **[PASS]** attribute is present - **[PASS]** value is valid - **[INFO]** No Content-Language HTTP header - **[INFO]** Language signals are inconsistent — The attribute and Content-Language header should agree. ### Readability & Typography (A+ — 100/100) *Font sizes and tap targets checked* ### Viewport Configuration (A+ — 100/100) *Viewport properly configured* - **[PASS]** Viewport meta tag is present - **[PASS]** width=device-width is set - **[PASS]** User zooming is allowed ### Third-Party Trackers (A+ — 95/100) *1 trackers detected* - **[INFO]** 1 third-party trackers detected — Found 1 analytics, 0 advertising, 0 marketing, 0 tag manager trackers. ### Cookie & Tracker Inventory (A+ — 100/100) *0 cookies · 1 trackers · 0 pre-consent* - **[INFO]** 1 third-party tracker(s) detected on page --- ## Legal ### Legal Page Ecosystem (F — 30/100) *1 of 7 expected legal pages detected* - **[PASS]** Privacy Policy detected — Found at https://foundation.rust-lang.org/policies/privacy-policy/#docs.rs. - **[WARNING]** Terms of Service not detected — No link matching common Terms of Service URL patterns or link text was found. Most websites are expected to have a Terms of Service, especially those collecting user data. - **[INFO]** Cookie Policy not detected — No link matching common Cookie Policy URL patterns or link text was found. Most websites are expected to have a Cookie Policy, especially those collecting user data. - **[INFO]** Accessibility Statement not detected — No link matching common Accessibility Statement URL patterns or link text was found. Most websites are expected to have a Accessibility Statement, especially those collecting user data. - **[INFO]** DMCA / Copyright Notice not detected — No link matching common DMCA / Copyright Notice URL patterns or link text was found. Most websites are expected to have a DMCA / Copyright Notice, especially those collecting user data. - **[INFO]** Refund / Returns Policy not detected — No link matching common Refund / Returns Policy URL patterns or link text was found. Most websites are expected to have a Refund / Returns Policy, especially those collecting user data. - **[INFO]** Acceptable Use Policy not detected — No link matching common Acceptable Use Policy URL patterns or link text was found. Most websites are expected to have a Acceptable Use Policy, especially those collecting user data. ### Copyright Notice (C — 55/100) *No copyright notice detected* - **[INFO]** No copyright notice detected — No copyright notice detected in the page content. While not legally required in most jurisdictions (copyright exists automatically), a notice is standard practice and signals site ownership. ### Regulatory Indicators *1 regulatory indicator(s) detected* - **[INFO]** This is a technical scan, not a legal assessment — BeaverCheck detects technical indicators that may suggest regulatory relevance. This is not a compliance audit and should not be relied upon for legal decisions. Consult qualified legal counsel for compliance assessments. - **[INFO]** GDPR indicators detected (moderate confidence) — Indicators suggesting GDPR may be relevant: Privacy policy page found. EU General Data Protection Regulation — governs collection and processing of personal data of EU residents. ### Third-Party Data Sharing *0 third-party service(s) detected* - **[INFO]** Data inventory for transparency purposes — This inventory identifies third-party services that receive data from your site visitors. Under regulations like GDPR (Article 30), maintaining records of data processing activities is commonly considered a best practice. This automated scan provides a starting point — it may not capture all data flows. - **[INFO]** No recognized third-party data-sharing services detected — This page does not appear to load external tracking, analytics, or advertising scripts. ### Compliance Badges (C — 55/100) *0 compliance badge(s) detected* - **[INFO]** No compliance badges detected — No recognized compliance certification badges or seals were found. This is common — many sites do not display compliance badges. --- ## Availability ### CDN & Delivery (A — 85/100) *Fastly (MISS)* - **[PASS]** Site is served via Fastly CDN - **[INFO]** CDN cache status: MISS ### HTTP Caching (A — 90/100) *max-age=60 (1 minute)* - **[PASS]** Cache-Control header is set - **[PASS]** Effective TTL: 1 minute (max-age=60) - **[INFO]** No ETag or Last-Modified header — Conditional requests (304 Not Modified) are not possible without validators. ### Transport Security (A — 90/100) *HTTP/3, HSTS, and TLS version analysis* - **[INFO]** HTTP/3 (QUIC) not advertised — HTTP/3 eliminates head-of-line blocking. If your CDN supports it, consider enabling it. - **[PASS]** HSTS enabled (base policy) - **[INFO]** HSTS missing includeSubDomains — Without includeSubDomains, HSTS only protects the exact domain. - **[PASS]** TLS 1.3 in use (fastest handshake, 1-RTT) --- ## Accessibility ### Landmark Structure (D — 50/100) *1 landmarks* - **[CRITICAL]** No
landmark found — Screen reader users cannot quickly navigate to the primary content. Wrap your main content in
. - **[PASS]** 1