Security

Learn how GitHub’s CodeQL leveraged AI modeling and multi-repository variant analysis to discover a new CVE in Gradle.

In this post, we’ll deep dive into some interesting attacks on mTLS authentication. We’ll have a look at implementation vulnerabilities and how developers can make their mTLS systems vulnerable to user impersonation, privilege escalation, and information leakages.

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.

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!

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.

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.

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.

Introducing a new tool to monitor and control the permissions of the repository token for GitHub Actions.

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.

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.

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.

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

Open source maintainers and security researchers embrace a new best practice to report and fix vulnerabilities.

How to verifiably link npm packages to their source repository and build instructions.