Within hours of the Cloudflare outage on Tuesday, 18th November 2025, reports began surfacing about the causes of the disruption. While this is a standard part of post-event analysis, the Cloudflare outage must be examined within the broader context of what is happening in the web services space.
A year of high-profile outages
To take a short trip down memory lane. The Cloudflare outage is just one of 12 significant disruptions among major companies in 2025. These include:
• Google Cloud in June, which impacted services like Gmail and Spotify due to a failure in its Cloud infrastructure
• Cloudflare in June, triggered by a storage infrastructure failure in its Workers KV service, affecting services like Access, Gateway, and Images
• Cloudflare in August, resulting from network congestion between Cloudflare and AWS us-east-1
• AWS in October, caused by a failure in the DynamoDB API’s DNS resolution and gateway path
These incidents highlight the fragility of interconnected infrastructure and the widespread impact when a core provider experiences issues.
The root cause of the recent Cloudflare outage
According to Cloudflare, the most recent outage was not the result of a cyberattack or malicious activity. Instead, it was caused by a hidden software bug triggered by a routine configuration change. The bug caused a configuration file used for both mitigations to grow to an unexpectedly large size, which crashed a core network service. This led to a cascading failure, resulting in widespread HTTPS 500 errors, commonly known as a 500 Internal Server Error, across major websites.
Reoccurring patterns in 2025 outages
These 2025 events reveal reoccurring outage patterns from predictable causes that have precipitated out of Configuration Cascade Effects, Interconnected Service Dependencies, DNS resolution and Network Path Failures, Third-party Provider Failures, and cyberattacks.
However, many are not keen to recognise that the aggregation of multiple services under a centralised framework is the ‘Achilles Heel’. Post-incident reviews often focus heavily on root cause analysis and digital forensics, but equal attention must be given to how services can be modified to prevent future disruptions. Risk-based scenario testing and architectural adjustments are critical to averting similar events.
Understanding Cloudflare’s infrastructure
For anyone not familiar with their infrastructure, Cloudflare operates as a reverse proxy, routing IP requests through a fault-tolerant, distributed network. Its architecture includes anycast mesh routing to direct users to the nearest server, high-availability clusters with data syncing, and dynamic routing systems that bypass external TCP/IP outages by finding alternative paths.
Their suite of features web performance and security services include:
• Content Delivery Network (CDN): distributes content across global servers to reduce latency and improve load times
• DDoS protection: mitigates distributed denial-of-service attacks by absorbing and filtering malicious traffic
• Web Application Firewall (WAF): protects against common web exploits like SQL injection and cross-site scripting
• SSL/TLS encryption: provides free SSL certificates to secure data transmission.
• DNS services: manages domain name system records and offers advanced features like DNSSEC
• Load balancing: distributes traffic across multiple servers to prevent overload
• Caching: stores frequently access content at edge locations for faster delivery
• Bot management: identifies and mitigates traffic from malicious bots
• Developer platform: tools like Cloudflare Workers for running serverless functions at the Edge
• Analytics: provides insights into website traffic and performance
While these features make Cloudflare a one-stop-shop for web services, this centralisation introduces significant risks, including vendor lock-in and single points of failure.
The risks of centralised service providers
For a business that subscribes to all or most of these services under a single service provider, it is akin to what we call ‘putting all of one’s eggs in a single basket’, referred to as one-stop-shops. These centralised frameworks can undermine the distributed services model, leading to systemic risks. When one interconnected service fails, it often triggers a domino effect, where one event causes a chain reaction of subsequent failures.
Using multiple service providers for different needs can mitigate these risks. Isolating services in separate environments reduces the likelihood of a breach affecting the entire system. A piecemeal approach also allows businesses to select the best solutions for specific needs, manage costs more effectively, and allocate resources like CPU and RAM more efficiently.
Misconceptions about Web3 and Blockchain as solutions
Some Distributed Ledger Technology (DLT) and Web3 proponents have suggested a sequential linear hashed data block framework as the solution to Cloudflare’s issues. Clearly, they don’t understand that Cloudflare has a robust, fault-tolerant, distributed, and redundant architecture. Besides, DLT Layer-2 and Layer-3 have their own scaling and cybersecurity issues they have yet to resolve before touting this infrastructure as a solution.
Web3, which interfaces DLT Layer-2 contracts with Layer-3 web applications, is not a practical solution for traditional web support issues. While innovative, these frameworks are not yet mature enough to replace the robust, fault-tolerant systems already in place.
The complexity of modern web systems
As consumer demand for features and ease of use grows, web systems become increasingly complex. Modern web environments rely on dynamic algorithms for rendering pages, supporting payment infrastructure, and enabling interactive features. This complexity introduces new vulnerabilities, such as man-in-the-middle (MITM) attacks, phishing scams, and infrastructure weaknesses. Balancing system complexity with risk management is essential. Web services must conduct risk-based analyses to determine whether to rely on a single provider or integrate multiple service providers into their systems.
The broader impact of the Cloudflare outage
The recent Cloudflare outage affected a wide range of companies across various industries, including social media (X and Discord), gaming (League of Legends and Xbox Live), AI platforms (OpenAI), e-commerce (Shopify), finance (PayPal, Coindesk), streaming (Hulu and Spotify), and others (Amazon, Canva, Indeed). These disruptions underscore the critical role that Edge-infrastructure providers like Cloudflare play in keeping large portions of the internet operational.
As many false claims suggest, these outages are not due to the Internet’s “fragility and complexity.” Such claims reflect a misunderstanding of the distinction between the TCP/IP internet algorithms that enable the web to exist and the vulnerabilities in core web algorithms like HTTP/HTTPS, DNS, SSL/TLS, and supporting technologies such as CSS and HTML. These are highly complex algorithms implemented within web browsers to structure, style, and render web pages correctly for users.
The issue lies not in the foundational Internet protocols but in the increasing reliance on centralised web service providers to manage the growing complexity of modern web systems. This dependency creates systemic risks, where a single failure point can ripple across global systems, triggering widespread service vulnerabilities.
A path forward
The 2025 outages demonstrate that even highly redundant, distributed systems are vulnerable to systemic failures. While the architecture is designed to prevent localised hardware or network link failures, it cannot always prevent errors introduced into core software that runs across all servers simultaneously.
To build a more resilient digital ecosystem, businesses must embrace architectural diversity. By adopting a multi-vendor approach and isolating critical services, organisations can reduce systemic risks and prevent cascading failures. Resilience requires intentional design, where no single provider can disrupt global operations with a single point of failure.
The future of web services lies in pragmatic solutions that balance complexity with reliability, ensuring that the digital infrastructure can support the demands of modern technology without compromising security or stability.
About the author:
Dr. David Utzke is a pioneering innovator in Blockchain-based AI systems and decentralised data intelligence. His work synthesises emerging technologies with financial systems to create secure, autonomous frameworks for digital asset management, DeFi, and identity verification. With more than a decade serving at the U.S. Treasury’s IRS Cyber Crimes Unit, Dr. Utzke has led groundbreaking cases in digital forensics and decentralised finance. With experience spanning economics, cryptography, and machine learning, Dr. Utzke’s disruptive vision focuses on establishing transparent, human-centered technology that bridges the gap between AI and trust in digital transactions.
