Security

Resources for securing your supply chain, building more secure applications, and staying up-to-date with the latest vulnerability research. Get comprehensive insights into the latest security trends—and news from the GitHub Security Lab. You can also check out our documentation on code security on GitHub to find out how to keep your code and applications safe.

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Modeling CORS frameworks with CodeQL to find security vulnerabilities

Discover how to increase the coverage of your CodeQL CORS security by modeling developer headers and frameworks.

CVE-2025-53367: An exploitable out-of-bounds write in DjVuLibre

DjVuLibre has a vulnerability that could enable an attacker to gain code execution on a Linux Desktop system when the user tries to open a crafted document.

Understand your software’s supply chain with GitHub’s dependency graph

The GitHub dependency graph maps every direct and transitive dependency in your project, so you can identify risks, prioritize fixes, and keep your code secure.

GitHub Advisory Database by the numbers: Known security vulnerabilities and what you can do about them

Use these insights to automate software security (where possible) to keep your projects safe.

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Hack the model: Build AI security skills with the GitHub Secure Code Game

Dive into the novel security challenges AI introduces with the open source game that over 10,000 developers have used to sharpen their skills.

DNS rebinding attacks explained: The lookup is coming from inside the house!

DNS rebinding attack without CORS against local network web applications. Explore the topic further and see how it can be used to exploit vulnerabilities in the real-world.

Inside GitHub: How we hardened our SAML implementation

Maintaining and developing complex and risky code is never easy. See how we addressed the challenges of securing our SAML implementation with this behind-the-scenes look at building trust in our systems.

Bypassing MTE with CVE-2025-0072

In this post, I’ll look at CVE-2025-0072, a vulnerability in the Arm Mali GPU, and show how it can be exploited to gain kernel code execution even when Memory Tagging Extension (MTE) is enabled.

Welcome to Maintainer Month: Events, exclusive discounts, and a new security challenge

This May marks the fifth annual Maintainer Month, and there are lots of treats in store: new badges, special discounts, events with experts, and more.

Cutting through the noise: How to prioritize Dependabot alerts

Learn how to effectively prioritize alerts using severity (CVSS), exploitation likelihood (EPSS), and repository properties, so you can focus on the most critical vulnerabilities first.

How we’re making security easier for the average developer

Security should be native to your workflow, not a painful separate process.

How to request a change to a CVE record

Learn how to identify which CVE Numbering Authority is responsible for the record, how to contact them, and what to include with your suggestion.

Found means fixed: Reduce security debt at scale with GitHub security campaigns

Starting today, security campaigns are generally available for all GitHub Advanced Security and GitHub Code Security customers—helping organizations take control of their security debt and manage risk by unlocking collaboration between developers and security teams.

Localhost dangers: CORS and DNS rebinding

What is CORS and how can a CORS misconfiguration lead to security issues? In this blog post, we’ll describe some common CORS issues as well as how you can find and fix them.

GitHub found 39M secret leaks in 2024. Here’s what we’re doing to help

Every minute, GitHub blocks several secrets with push protection—but secret leaks still remain one of the most common causes of security incidents. Learn how GitHub is making it easier to protect yourself from exposed secrets, including today’s launches of standalone Secret Protection, org-wide scanning, and better access for teams of all sizes.