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Security report for kubernetes.io

The Linux Foundation · Technology · United States

Medium risk. 8 critical or high findings in Security headers, GDPR outside view and 1 other check.

Security score

60/100

Risk levelMedium

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

Kubernetes.io is the official website for Kubernetes, an open source container orchestration platform managed by The Linux Foundation. The site serves a global audience of developers, IT professionals, and enterprises seeking to deploy, scale, and manage containerized applications. It offers comprehensive documentation, case studies, training resources, and community engagement channels. The website is professionally designed, mobile optimized, and hosted on Google Cloud infrastructure, reflecting a mature digital presence. Technically, it uses Hugo as a static site generator, integrates Google Analytics and Tag Manager for tracking, and employs modern JavaScript libraries like jQuery. Security posture is strong with HTTPS enforced and no exposed sensitive data, though some security best practices like DNSSEC and security headers could be improved. Privacy compliance is basic, with no visible cookie consent or detailed privacy policy pages on the homepage. Overall, the site is trustworthy, authoritative, and well-maintained, supporting Kubernetes' position as a leading cloud native technology.

Scanned

This is an earlier scan of kubernetes.io. View the latest report

NIS2 and GDPR posture

GDPR outside view
35/ 100 · High
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

8 findings rated critical or high. Fix these first.

  1. Security headers

    Security headers are instructions your web server sends to every visitor’s browser. Missing ones leave visitors more exposed to attacks such as clickjacking and injected scripts.

    • High

      Missing X-Frame-Options header

      Prevents clickjacking attacks

      What to do: Add "X-Frame-Options: DENY" or "X-Frame-Options: SAMEORIGIN"

    • High

      Missing Content-Security-Policy header

      Controls resources the browser is allowed to load

      What to do: Implement a Content-Security-Policy appropriate for your application

      • ASVS V3.4.3
      • OWASP Secure Headers: OWASP Secure Headers Project recommends Content-Security-Policy: default-src 'self'; form-action 'self'; base-uri 'self'; object-src 'none';…

  2. GDPR outside view

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

    • High

      No Privacy Policy found

      GDPR requires a clear and accessible privacy policy

      What to do: Add a comprehensive privacy policy page and link to it prominently

    • 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

    • High

      No Cookie Consent Banner found

      GDPR requires explicit consent for non-essential cookies

      What to do: Implement a cookie consent banner that appears on first visit

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

Keep watching kubernetes.io

This scan found 25 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.

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

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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
30
Email security
70
DNS health
75
Network security
100
GDPR outside view
35
Average
60

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

Breach exposure

Leaked credentials and lookalike domains from OffSeq Breach. The counts are free; the detailed lists are paid add-ons.

Dark web exposure

Add-on

Leaked records that mention kubernetes.io, from OffSeq Breach.

Total records
296
Employees
0
Customers
241
Third parties
55
Weak passwords
21%

5 subdomains affected

See the 10 newest leaked credentials

A one-off add-on to this report that lists the most recent identifier and password pairs OffSeq Breach holds for kubernetes.io.

Select it in the checkout above.

Breach keeps ingesting new leaks, so these numbers can grow between scans.

Open in Breach(opens in a new tab)Monitor on Breach(opens in a new tab)

Technical appendix

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

Business context

Business profile

The Linux Foundation operates Kubernetes.io as part of its open source ecosystem, positioning Kubernetes as a critical technology in cloud native infrastructure. The business model is community-driven with sponsorship and support from major cloud providers and enterprises. Kubernetes enjoys a strong market position as the de facto container orchestration standard, supported by CNCF graduation status. The website highlights partnerships, case studies, and training, indicating a broad ecosystem and active user base. Revenue streams likely include training, certification, and sponsorships. The site targets developers, operators, and enterprises seeking scalable container solutions. Strategic observations include strong brand consistency, active community engagement, and alignment with industry standards.

Security posture

The website demonstrates a mature security posture with HTTPS enforced and no visible vulnerabilities or exposed sensitive information. However, it lacks explicit security policies, incident response contacts, and vulnerability disclosure mechanisms, which are important for transparency and trust. DNSSEC is not enabled, and security headers are not explicitly detected, representing areas for improvement. The use of third-party analytics introduces moderate user tracking, but no cookie consent mechanism is present, which may raise privacy concerns under GDPR. Overall, the site is secure but could enhance compliance and transparency to strengthen its security culture and incident readiness.

Recommendations

  1. Enable DNSSEC to improve domain security and prevent DNS spoofing.
  2. Publish a clear security policy and incident response contact information on the website.
  3. Implement a cookie consent banner to comply with privacy regulations and inform users.
  4. Add security headers such as Content Security Policy (CSP), HSTS, and X-Frame-Options.
  5. Establish a vulnerability disclosure program and publish a security.txt file.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
The Linux Foundation
Description
Kubernetes is an open source system for automating deployment, scaling, and management of containerized applications. It groups containers into logical units for easy management and discovery. It is designed for planet-scale operations based on Google's experience and community best practices.
Key services
Container orchestration, Automated rollouts and rollbacks, Service discovery and load balancing, Storage orchestration, Secret and configuration management, Automatic bin packing, Batch execution, Self-healing, Horizontal scaling, IPv4/IPv6 dual-stack
Content quality
excellent
Branding
consistent

Technology

Stack
Hugo, jQuery, Google Analytics, Google Tag Manager
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • No exposed sensitive data in HTML
  • No vulnerable libraries detected

Analytics and tracking

Services
Google Analytics, Google Tag Manager
Tracking level
moderate
Privacy practices
basic

Advertising

Marketing tools
Mailchimp
Transparency
basic

Site quality

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

Key observations

  1. Website is fully accessible with rich content and no blocking.
  2. Strong branding and consistent professional design.
  3. Comprehensive technical documentation and community engagement.
  4. No explicit privacy or cookie policy pages found on homepage but likely present in documentation.
  5. No direct contact emails or phone numbers visible; contact via community forums and forms.
  6. No explicit security policy or incident response info published.
  7. Uses modern web technologies and analytics tools.
  8. No suspicious or malicious indicators found.
Technical notes

Notes

The website is built using the Hugo static site generator, ensuring fast load times and good performance. It uses jQuery and integrates Google Analytics and Tag Manager for analytics. Hosting is on Google Cloud infrastructure, inferred from DNS nameservers. The site is mobile optimized with responsive design and accessibility features. SEO is well implemented with comprehensive meta tags, Open Graph, and JSON-LD structured data. There is no evidence of technical debt or outdated libraries. Opportunities exist to modernize analytics with privacy-focused tools and enhance security headers. Overall, the technical infrastructure is robust, performant, and aligned with modern web standards.
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

Earlier scans of this domain

  1. 60/100 +2Medium33 findingsView report
  2. 58/100Medium34 findingsView report
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