GitHub Security Lab

Learn to debug and fix your CodeQL queries.

Addressing a surge in package registry attacks, GitHub is strengthening npm’s security with stricter authentication, granular tokens, and enhanced trusted publishing to restore trust in the open source ecosystem.

When a chat conversation is poisoned by indirect prompt injection, it can result in the exposure of GitHub tokens, confidential files, or even the execution of arbitrary code without the user’s explicit consent. In this blog post, we’ll explain which VS Code features may reduce these risks.

Learn how the GitHub Secure Open Source Fund helped 71 open source projects significantly improve their security posture through direct funding, expert guidance, and actionable playbooks.

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

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.

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

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 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.

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.

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.

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

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.

A step-by-step guide for open source maintainers on how to handle vulnerability reports confidently from the start.

Critical authentication bypass vulnerabilities (CVE-2025-25291 + CVE-2025-25292) were discovered in ruby-saml up to version 1.17.0. In this blog post, we’ll shed light on how these vulnerabilities that rely on a parser differential were uncovered.