Stay secure online with the latest Cloudflare updates and insights in information security, protecting websites and networks from threats.
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Background for this topic.
Cloudflare operates a global content delivery and security network that sits between internet users and websites or services. It provides distributed denial-of-service (DDoS) mitigation, web application firewall (WAF) capabilities, and secure DNS resolution, helping to filter malicious traffic and improve site availability. By proxying traffic through its edge servers, Cloudflare can inspect, block, or rate-limit requests based on threat intelligence and configured security policies.
From an information security perspective, Cloudflare’s platform introduces critical considerations around trust and attack surface. Organizations relying on it must monitor for vulnerabilities in its software stack and configuration errors that could expose sensitive data or allow bypass of protections. Additionally, Cloudflare’s role as a traffic intermediary means that any compromise or misconfiguration could impact confidentiality and integrity of data in transit, making careful management of encryption and access controls essential.
Weekly headline count for the current query.
Cybersecurity researchers have discovered a remote denial-of-service exploit that affects major web servers, including NGINX, Apache HTTPD, Microsoft IIS, Envoy, and Cloudflare Pingora
Threat actors are using adversary-in-the-middle (AitM) phishing pages to seize control of TikTok for Business accounts in a new campaign, according to a report from Push Security
The distributed denial-of-service (DDoS) botnet known as AISURU/Kimwolf has been attributed to a record-setting attack that peaked at 31.4 Terabits per second (Tbps) and lasted only 35 seconds
Recent major cloud service outages have been hard to miss. High-profile incidents affecting providers such as AWS, Azure, and Cloudflare have disrupted large parts of the internet, taking down websites and services that many other systems depend on. The resulting ripple effects have halted applications and workflows that many organizations rely on every day
Cloudflare has addressed a security vulnerability impacting its Automatic Certificate Management Environment (ACME) validation logic that made it possible to bypass security controls and access origin servers. "The vulnerability was rooted in how our edge network processed requests destined for the ACME HTTP-01 challenge path (/.well-known/acme-challenge/*)," the web infrastructure
Cloudflare on Wednesday said it detected and mitigated the largest ever distributed denial-of-service (DDoS) attack that measured at 29.7 terabits per second (Tbps)
Cybersecurity researchers are calling attention to a nefarious campaign targeting WordPress sites to make malicious JavaScript injections that are designed to redirect users to sketchy sites
Microsoft's Digital Crimes Unit said it teamed up with Cloudflare to coordinate the seizure of 338 domains used by RaccoonO365, a financially motivated threat group that was behind a phishing-as-a-service (Phaas) toolkit used to steal more than 5,000 Microsoft 365 credentials from 94 countries since July 2024
Cloudflare on Tuesday said it automatically mitigated a record-setting volumetric distributed denial-of-service (DDoS) attack that peaked at 11.5 terabits per second (Tbps)
Cybersecurity researchers have shed light on a new versatile malware loader called CastleLoader that has been put to use in campaigns distributing various information stealers and remote access trojans (RATs)
Cloudflare on Tuesday said it mitigated 7.3 million distributed denial-of-service (DDoS) attacks in the second quarter of 2025, a significant drop from 20.5 million DDoS attacks it fended off the previous quarter
Cloudflare on Thursday said it autonomously blocked the largest ever distributed denial-of-service (DDoS) attack ever recorded, which hit a peak of 7.3 terabits per second (Tbps)
A new campaign is making use of Cloudflare Tunnel subdomains to host malicious payloads and deliver them via malicious attachments embedded in phishing emails
The threat actors behind the ClearFake campaign are using fake reCAPTCHA or Cloudflare Turnstile verifications as lures to trick users into downloading malware such as Lumma Stealer and Vidar Stealer
Web infrastructure and security company Cloudflare on Tuesday said it detected and blocked a 5.6 Terabit per second (Tbps) distributed denial-of-service (DDoS) attack, the largest ever attack to be reported to date
The Computer Emergency Response Team of Ukraine (CERT-UA) has disclosed that a threat actor it tracks as UAC-0125 is leveraging Cloudflare Workers service to trick military personnel in the country into downloading malware disguised as Army+, a mobile app that was introduced by the Ministry of Defence back in August 2024 in an effort to make the armed forces go paperless
The threat actor known as Gamaredon has been observed leveraging Cloudflare Tunnels as a tactic to conceal its staging infrastructure hosting a malware called GammaDrop
Cybersecurity researchers have warned of a spike in phishing pages created using a website builder tool called Webflow, as threat actors continue to abuse legitimate services like Cloudflare and Microsoft Sway to their advantage
Identity security is front, and center given all the recent breaches that include Microsoft, Okta, Cloudflare and Snowflake to name a few. Organizations are starting to realize that a shake-up is needed in terms of the way we approach identity security both from a strategic but also a technology vantage point. Identity security is more than just provisioning access The conventional view
Cloudflare has disclosed that it mitigated a record-breaking distributed denial-of-service (DDoS) attack that peaked at 3.8 terabits per second (Tbps) and lasted 65 seconds