
When Zuul was designed and developed, there was an inherent assumption that connections were effectively free, given we weren’t using mutual TLS (mTLS). It’s built on top of Netty, using event loops…
NTNetflix TechBlog·August 16, 2023Security 
Some best practices and important defenses to prevent common attacks against GitHub Actions that are enabled by stolen personal access tokens, compromised accounts, or compromised GitHub sessions.
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Matthew Masarik·August 15, 2023Security 
It was another record year for our Security Bug Bounty program! We’re excited to highlight some achievements we’ve made together with the bounty community in 2022!
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Jill Moné-Corallo·August 14, 2023Security 
Starting today, customers that use Cloudflare’s Advanced Certificate Manager can configure TLS settings on individual hostnames within a domain

Researchers from Purdue and NCSU have found a large number of command injection vulnerabilities in the workflows of projects on GitHub. Follow these four tips to keep your GitHub Actions workflows secure.
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Jaroslav Lobacevski, Kevin Backhouse·August 9, 2023Security 
Announced as part of the Back to School Safely: K-12 Cybersecurity Summit at the White House on Aug 7, Proj Cybersafe Schools will support eligible K-12 public school districts with Zero Trust

Meta is developing new privacy-enhancing technologies (PETs) to innovate and solve problems with less data. These technologies enable teams to build and launch privacy-enhanced products in a way that’s verifiable and safeguards user data. Using state-of-the-art cryptographic techniques, we have developed Private Data Lookup (PDL) that allows users to privately query a server-side data set. […] Rea
MEMeta Engineering·August 8, 2023Security 
The Cybersecurity and Infrastructure Security Agency (CISA) just released a report highlighting the most commonly exploited vulnerabilities of 2022.
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Himanshu, Sabina·August 4, 2023Security 
This blog post describes two security vulnerabilities in Decidim, a digital platform for citizen participation. Both vulnerabilities were addressed by the Decidim team with corresponding update releases for the supported versions in May 2023.

The Google Information Security Team revealed a new flaw in AMD's Zen 2 processors in a blog post today. The 'Zenbleed' flaw affects the entire Zen 2 product stack, from AMD's EPYC data center processors to the Ryzen 3000 CPUs, and can be exploited to steal sensitive data processed in the CPU,
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Derek Chamorro, Martin·July 25, 2023Security 
Q2 2023 saw an unprecedented escalation in DDoS attack sophistication. Pro-Russian hacktivists REvil, Killnet and Anonymous Sudan joined forces to attack Western sites. Mitel vulnerability exploits surged by a whopping 532%, and attacks on crypto rocketed up by 600%.

GitHub has identified a low-volume social engineering campaign that targets the personal accounts of employees of technology firms. No GitHub or npm systems were compromised in this campaign. We’re publishing this blog post as a warning for our customers to prevent exploitation by this threat actor.

Passkeys are now available in public beta. Opting in lets you upgrade security keys to passkeys, and use those in place of both your password and your 2FA method.

GitHub’s Information Security and Privacy Management System (ISPMS) has been certified against ISO/IEC 27701:2019 (PII Processor) and 27018:2019 standards, as well as the Cloud Controls Matrix (CCM). These standards and frameworks are internationally recognized for security and privacy program best practices.
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Brandon Griffeth, Glory Francke·July 5, 2023Security 
SELinux is the most popular Linux Security Module used to isolate and protect system components from one another. Learn about different access control systems and Linux security as I introduce the foundations of a popular type system.

Introducing a new tool to monitor and control the permissions of the repository token for GitHub Actions.
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Jaroslav Lobacevski·June 26, 2023Security 
Learn the basics of CodeQL and how to use it for security research! In this blog, we will teach you how to leverage GitHub’s static analysis tool CodeQL to write custom CodeQL queries.
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Sylwia Budzynska·June 15, 2023Security 
GitHub’s VIP Bug Bounty Program has been updated to include a clear and accessible criteria for receiving an invitation to the program and more. Learn more about the program and how you can become a Hacktocat, and join our community of researchers who are contributing to GitHub’s security with fun perks and access to staff and beta features!

We’ve launched the beta of code scanning support for Swift. This launch, paired with our launch of Kotlin support in November, means that CodeQL covers both IOS and Android development languages, bringing a heightened level of security to the mobile application development process.
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Walker Chabbott, Pierre Tempel·June 6, 2023Security 
For the ninth anniversary, we want to focus on access to affordable cyber security tools and what we have learned protecting the most vulnerable communities

In this blog, I’ll look at CVE-2022-46395, a variant of CVE-2022-36449 (Project Zero issue 2327), and use it to gain arbitrary kernel code execution and root privileges from the untrusted app domain on an Android phone that uses the Arm Mali GPU. I’ll also explain how root cause analysis of CVE-2022-36449 led to the discovery of CVE-2022-46395.

GitHub Advanced Security for Azure DevOps is now available for public preview, making GitHub’s same application security testing tools natively available on Azure Repos.

Secure your team’s usage of AI tools with Cloudflare One

Code scanning detects ReDoS vulnerabilities automatically, but fixing them isn’t always easy. This blog post describes a 4-step strategy for fixing ReDoS bugs.

Learn how Clerk is reimagining authentication to embrace the architecture of framework-defined infrastructure.

Code scanning’s tool status gives you a bird’s eye view of your application security stack, allowing you to quickly confirm everything is working, or troubleshoot any tool in your application security arsenal.
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Walker Chabbott, Alona Hlobina·May 4, 2023Security 
Highlighting the advantages of self-hosted solutions over cloud-based alternatives and exploring collaborative password management and more, P demonstrates how to organize convenient and secure password management in a company.

We’re sharing our latest threat research and technical analysis into persistent malware campaigns targeting businesses across the internet, including threat indicators to help raise our industry’s collective defenses across the internet. These malware families – including Ducktail, NodeStealer and newer malware posing as ChatGPT and other similar tools– targeted people through malicious browser ex

A new alert rules engine for Dependabot leverages alert metadata to identify and auto-dismiss up to 15% of alerts as false positives.

Cloudflare proudly sponsored Australian Privacy Awareness Week 2023, championing privacy and security technologies to help customers protect sensitive data, forming the "new privacy basics."


Researchers have recently published the discovery of a new DDoS reflection/amplification attack vector leveraging the SLP protocol. Cloudflare expects the prevalence of SLP-based DDoS attacks to rise in the coming weeks
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Alex Forster, Omer·April 25, 2023Security 
As someone who is passionate about technology, security, and its potential to improve our lives, I knew that I wanted to work for a company that shared those values.

Dockerizing your Node.js apps can lead to smashing success—offering consistency, easy debugging, and hassle-free dependency management. When you host this container on Kinsta, you also benefit from high-speed performance, robust security, and top-notch scalability. By combining these two, you

Open source maintainers and security researchers embrace a new best practice to report and fix vulnerabilities.
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Eric Tooley, Kate Catlin·April 19, 2023Security 
How to verifiably link npm packages to their source repository and build instructions.
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Brian DeHamer, Philip Harrison·April 19, 2023Security 
Cloudflare Zero Trust named to Gartner® Magic Quadrant™ for Security Service Edge

Learn how the new and improved Network Analytics dashboard provides security professionals insights into their DDoS attack and traffic landscape

Threat actors kicked off 2023 with a bang. The start of the year was characterized by a series of hacktivist campaigns against Western targets, and record-breaking hyper volumetric attacks

In this post, I’ll look at a security-related change in version r40p0 of the Arm Mali driver that was AWOL in the January update of the Pixel bulletin, where other patches from r40p0 was applied, and how these two lines of changes can be exploited to gain arbitrary kernel code execution and root from a malicious app. This highlights how treacherous it can be when backporting security changes.

With enterprise accounts for all, your organization can take advantage of all that GitHub Enterprise has to offer, from GitHub Actions and GitHub Advanced Security, to Copilot.
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Melody Mileski, Erika Xu·April 5, 2023Security 
If you are a developer who wants to concentrate on delivering a killer application rather than worrying about countless security issues, threat model documents can help you do that. With small architectural changes, we can make these threats manageable and prevent them in the future.
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Zack Grossbart Terry Yao·April 5, 2023Security 
This blog post outlines the root cause analysis and solution for a bug found in Cloudflare’s mTLS implementation

A high-quality audit log is an essential tool for enterprises to ensure compliance, maintain security, investigate issues, and promote accountability.

Learn more about static analysis and how to use it for security research! In this blog post series, we will take a closer look at static analysis concepts, present GitHub’s static analysis tool CodeQL, and teach you how to leverage static analysis for security research by writing custom CodeQL queries.
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Sylwia Budzynska·March 31, 2023Security 
Over the past 24 hours, Cloudflare has observed HTTP DDoS attacks targeting university websites in Australia. Universities were the first of several groups publicly targeted by the pro-Russian hacker group Killnet and their affiliate AnonymousSudan, as revealed in a recent Telegram post
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Patrick, Ben Munroe·March 29, 2023Security 
Dealing with sensitive data is an important topic for any app. In this article, you will find out how to handle sensitive or confidential information in your apps and what Row-Level Security means.

Passkeys are a new login credential based on public-key cryptography that replace the need for username and password sign-ins.
SEShopify Engineering·March 24, 2023Security 
Cloudflare will now allow customers that are managing DNS externally to auto-renew certificates through DCV Delegation

Writing secure code is as much of an art as writing functional code, and it is the only way to write quality code. Learn how our Secure Code Game can provide you with hands-on training to spot and fix security issues in your code so that you can build a secure code mindset.
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Joseph Katsioloudes·March 23, 2023Security 
Learn how Cloudflare made it easier to shift from protecting applications, to protecting employees, and making sure they are protected everywhere during Security Week 2023

Revealing Account Security Analytics and Events, new eyes on your account in Cloudflare dashboard to give holistic visibility. No matter how many zones you manage, they are all there!

Cloudflare’s Area 1 Solution works with Knowbe4 to provide customers with security and awareness training

IBM and Cloudflare continue to partner together to help customers meet the unique security, performance, resiliency and compliance needs of their customers through the addition of exciting new product and service offerings.

Now, customers will be able to use our Cloudflare Tunnels product to send traffic to the key server through a secure channel, without publicly exposing it to the rest of the Internet

Cloudflare has developed proprietary models leveraging machine learning and other advanced analytical techniques to detect security threats that take advantage of the domain name system (DNS)

We are making the machine learning empowered WAF and Security analytics view available to our Business plan customers, to help detect and stop attacks before they are known

One year ago we published our first Application Security Report. For Security Week 2023, we are providing updated insights and trends around mitigated traffic, bot and API traffic, and account takeover attacks.
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Michael Tremante, David Belson·March 14, 2023Security 
Cloudflare is excited to launch the Descaler Program, a frictionless path to migrate existing Zscaler customers to Cloudflare One. Cloudflare is making it even easier for enterprise customers to make the switch to a faster, simpler, and more agile foundation for security and network transformation
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Corey Mahan, Aj·March 14, 2023Security 
The Cloudflare App for Sumo Logic now supports Zero Trust logs for out of the box, ready-made security dashboards
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Corey Mahan, Drew Horn·March 14, 2023Security