Skip to main content

Security report for chain.link

Chainlink · Technology · United States

Low risk. 3 critical or high findings in GDPR outside view and SSL/TLS.

Security score

76/100

Risk levelLow

0–100, higher is better. How it is calculated

Chainlink is a leading decentralized oracle network that connects blockchains to real-world data, other blockchains, and enterprise systems. It serves major financial institutions, DeFi protocols, and governments worldwide, providing critical infrastructure for onchain finance, cross-chain interoperability, and secure data feeds. The company is well-established with a domain age since 2017 and strong partnerships with industry leaders such as J.P. Morgan, Mastercard, and UBS. Their platform offers a suite of products including Chainlink CCIP, data feeds, automation, and verifiable randomness, positioning them as a backbone for blockchain applications. Technically, Chainlink's website is built on modern web technologies including Webflow CMS, Cloudflare CDN, and integrates analytics and marketing tools like HubSpot and Google Tag Manager. The site is fast, mobile-optimized, accessible, and SEO-friendly, reflecting a mature digital presence. Security posture is strong with HTTPS, security headers, and domain registration protections, though DNSSEC is not enabled and no explicit security policy or incident response contacts are published. Overall, Chainlink demonstrates a high level of professionalism, trustworthiness, and compliance with privacy regulations including GDPR. The website content is comprehensive, well-branded, and targeted at institutional and developer audiences. No critical security vulnerabilities or suspicious activities were detected. Recommendations include enabling DNSSEC, publishing a security policy, and adding vulnerability disclosure mechanisms to further enhance trust and security. This analysis indicates Chainlink is a credible, secure, and technically sound organization with a strong market position in blockchain technology and decentralized finance.

Scanned

NIS2 and GDPR posture

GDPR outside view
68/ 100 · Medium
Checks completed
7of 7

NIS2 Art. 21(2)

  1. (a) Risk analysis and security policies: Not visible from outside
  2. (b) Incident handling: One indicator
  3. (c) Business continuity, backups and crisis management: Not visible from outside
  4. (d) Supply chain security: Not visible from outside
  5. (e) Secure acquisition, development and maintenance, including vulnerability handling: Partly checked
  6. (f) Assessing the effectiveness of security measures: Not visible from outside
  7. (g) Cyber hygiene and security training: Not visible from outside
  8. (h) Cryptography and encryption: Partly checked
  9. (i) HR security, access control and asset management: One indicator
  10. (j) Multi-factor authentication and secured communications: Not visible from outside

This scan rated NIS2 with an earlier keyword method that is no longer shown; rescan for the per-article view. Risk management, continuity, supply chain, training, MFA, management oversight (Art. 20) and incident reporting (Art. 23) need internal evidence, and Guard cannot tell whether NIS2 applies to this organisation.

GDPR is indicative only, based on publicly visible signals: Articles 7, 12, 13 and 32 of Regulation (EU) 2016/679 and Article 5(3) of the ePrivacy Directive. Not a certification or legal assessment.

Priority findings

3 findings rated critical or high. Fix these first.

  1. GDPR outside view

    These are the privacy signals visitors and data protection authorities look for under GDPR.

    • High

      No Cookie Policy found

      GDPR requires clear information about cookie usage

      What to do: Add a dedicated cookie policy explaining cookie usage and purposes

  2. SSL/TLS

    TLS encrypts the connection and proves the site is really yours. Weak or expiring certificates trigger browser warnings and put traffic at risk.

    • High

      Weak Protocols Supported

      Server supports weak protocols: TLSv1.1

      What to do: Disable TLS 1.0, TLS 1.1, and all SSL versions

      • CWE-327
      • OWASP A04:2025
      • ASVS V12.1.1
    • High

      SSL Certificate Expires Soon

      SSL certificate expires in 24 days

      What to do: Renew SSL certificate before expiration

      • NIS2 21(2)(h)
      • IR 2024/2690 9.2(c): Implementing Regulation (EU) 2024/2690, Annex point 9.2(c): Cryptography
      • NIST SC-17: NIST SP 800-53 Rev. 5 SC-17: Public Key Infrastructure Certificates

Need hands-on remediation? Email guard@offseq.com

Keep watching chain.link

This scan found 19 issues across 6 checks. Monitoring re-runs those checks daily, emails you when something material changes and records each fix, so you can show progress.

Daily monitoring

Recommended

€25per month

  • TLS certificates and expiry
  • DNS records
  • SPF, DKIM and DMARC
  • Security headers
  • GDPR and NIS2 posture
  • Exposed services
  • Third-party trackers
  • Security score drift

Email alerts on material changes and an exportable JSON history of every change.

Billed monthly to your card. Cancel anytime. The full timeline opens with your unlock code.

Full report

€39.90one-time

  • The complete analysis as a PDF you can cite
  • Email delivery with an unlock code
  • Lifetime access to this report

Prices incl. 21% VAT. Secure checkout by Mollie; sold by SEQ SIA, Latvia.

Results by check

Each check with its score, findings and the evidence it collected.

How this score is calculated

The security score runs 0–100, higher is better. It is the plain average of the security checks that completed in this scan, each counted equally. A check that could not run is left out: it counts neither as a pass nor as a fail.

Counted in this score

SSL/TLS
52
Security headers
60
Email security
85
DNS health
90
Network security
100
GDPR outside view
68
Average
76

Not counted

  • NIS2 outside view: Re-weights evidence from the TLS, email, DNS, network and hygiene checks, so counting it would count that evidence twice. Shown on its own.
  • OffSeq Observations: An AI reading of the site, useful context but not reproducible evidence. Shown on its own.

Findings that cap the score at 49

Each of these is serious on its own, so while any is present the site cannot rate better than high risk, however good the other checks are.

  • The certificate is not trusted by browsers
  • The website is not served over HTTPS
  • A database, remote desktop, file-sharing or Telnet service is reachable from the internet
  • The page loads a script from a compromised source
  • The domain registration has expired
  • SPF authorises every server to send mail as the domain

Partial scans

When the site blocks Guard or most checks cannot run, the score covers only the checks that ran (usually DNS and email), is capped at 75 and is shown as partial, without a risk level.

Risk levels

  • Critical0–25
  • High26–49
  • Medium50–75
  • Low76–100

Technical appendix

Business context, site observations and technical notes gathered during the scan, and the standards behind each reference.

Business context

Business profile

Chainlink occupies a leading position in the decentralized oracle market, serving a broad range of sectors including banking, capital markets, DeFi, and government. Their business model revolves around providing secure, decentralized data feeds and interoperability protocols that enable smart contracts to interact with off-chain data and other blockchains. Revenue streams likely include enterprise integrations, developer tools, and staking/economics programs. The company targets institutional clients, developers, and enterprises seeking blockchain solutions. Growth indicators include partnerships with major financial institutions and active community engagement. Chainlink's ecosystem includes developer resources, certification programs, and advocacy initiatives, supporting a robust partnership network and market expansion.

Security posture

Chainlink's security posture is strong, leveraging HTTPS with excellent SSL configuration and multiple security headers to protect users. The domain registration includes clientDeleteProhibited and related statuses to prevent unauthorized changes. No exposed sensitive data or vulnerable libraries were detected in the website content. However, the absence of a published security policy, incident response contacts, or vulnerability disclosure program represents a compliance gap. Privacy policies and cookie consent mechanisms are comprehensive and GDPR compliant. The company should consider publishing a security.txt file and incident response contacts to improve transparency and readiness. Overall, Chainlink demonstrates a mature security culture appropriate for its industry and clientele.

Recommendations

  1. Enable DNSSEC to enhance DNS security and prevent spoofing attacks.
  2. Publish a formal security policy and incident response contact information on the website.
  3. Implement a vulnerability disclosure program or security.txt file to encourage responsible reporting.
  4. Regularly audit and update third-party scripts and libraries to mitigate potential vulnerabilities.
  5. Maintain clear and updated privacy and cookie policies with explicit user consent mechanisms.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Chainlink
Description
Chainlink is the backbone of blockchain—a global standard connecting blockchains to real-world data, other chains, and public and enterprise systems—working with national governments and widely adopted by major financial institutions and top DeFi protocols.
Key services
Chainlink CCIP (Cross-Chain Interoperability Protocol), Market and Data Feeds, Automation, Verifiable Random Function (VRF), Data Streams, Proof of Reserve, Chainlink Functions
Content quality
excellent
Branding
consistent

Technology

Stack
Webflow CMS, Google Tag Manager, HubSpot Analytics and Marketing, Cloudflare DNS and CDN, Vidyard video player, YouTube iframe API, Jetboost
Frameworks
Webflow, Google Tag Manager
Platforms
Cloudflare, HubSpot
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
90/100
Good practices seen
  • HTTPS enforced
  • Domain status includes clientDeleteProhibited, clientUpdateProhibited, clientTransferProhibited
  • No DNSSEC enabled (recommend enabling)
  • No exposed sensitive data in HTML
  • Use of security headers

Analytics and tracking

Services
HubSpot Analytics, Google Analytics via Google Tag Manager
Tracking level
moderate
Privacy practices
good

Advertising

Ad networks
HubSpot Ads, Twitter Ads
Tracking pixels
HubSpot Analytics, Twitter Universal Website Tag
Marketing tools
HubSpot
Transparency
good

Site quality

Design
excellent
User experience
excellent
Content relevance
excellent
Navigation
excellent
Professionalism
excellent
Trustworthiness
high

Key observations

  1. Website is professionally designed and well-structured.
  2. Strong presence of business and technical information.
  3. Active community and developer engagement.
  4. Use of modern web technologies and analytics.
  5. No signs of malicious or suspicious activity.
  6. Comprehensive product and solution offerings detailed.
  7. Multiple trusted partnerships and endorsements visible.
Technical notes

Notes

The website is built using Webflow CMS, hosted behind Cloudflare CDN, and integrates multiple modern technologies including HubSpot for marketing and analytics, Google Tag Manager, and Vidyard for video content. The site is well-optimized for performance, mobile responsiveness, and accessibility. Structured data (JSON-LD) is extensively used for SEO and rich search results. The technical infrastructure reflects a modern, scalable, and secure web presence with no significant technical debt or performance issues detected. Opportunities exist to enable DNSSEC and enhance security transparency through published policies.
Standards and sources

Reference chips under each finding point to the standard, regulation or specification the finding relates to. They are taken from the official datasets below and mapped conservatively: a finding with no defensible link shows none. NIS2 and GDPR references mark where a finding is relevant evidence, not a compliance verdict. Implementing Regulation (EU) 2024/2690 binds digital infrastructure and digital service providers; for other entities it is the most detailed public reading of the Article 21 measures. WCAG, EN 301 549, European Accessibility Act and Web Accessibility Directive references name the requirement an automated accessibility rule relates to; they are not a conformance verdict.

Retrieved 2026-10-25

Reviews of this site

Share your experience with chain.link. Every review is verified by email and published after moderation.

Overall rating
Select a rating
4000 characters remaining

We’ll email you to confirm your review and keep your details private.

Community rating

No published reviews yet. Be the first to review chain.link.

Feedback on this report

Rate this report, add an optional comment, and tell us if you want a security specialist to follow up.

Overall report quality
Select a rating
2000 characters remaining

We only use your feedback to improve Guard reports. Contact details are never shared.