Check out how my colleague Man Yue Mo and I used LLMs to triage CodeQL results. The GitHub Security Lab Taskflow Agent and the prompts we used are open source and ready to be used! github.blog/security/ai-...

This is amazing. Use a SAST to detect security issues, and then triage those alerts with LLMs, to remove false positives and focus on real and exploitable issues. And of course, the framework is open source.

Learn how we triage security alerts in GitHub Actions and JavaScript projects with the new GitHub Security Lab Taskflow Agent, and leverage LLM to focus on the exploitable vulnerabilities. github.blog/security/ai-...

Excited to share our open source agentic framework for security research, a collaborative framework that lets the community share AI "taskflows”! Read @kevinbackhouse.bsky.social 's blog post for details and a demo. Join us in strengthening open-source security! github.blog/security/com...

I don't know who needs to hear this: if you're thinking about automating a trivial task for the third time: just do it now! It doesn't need to be something complicated, often a shell script is enough. $1 refers to the first argument passed to the shell script. (noted so I don't forget 😉)

Einstein said: “Insanity is doing the same thing over and over again and expecting different results.” It looks like Einstein never used LLMs.

GitHub Security Lab discovered a critical vulnerability in WooCommerce. We’d like to thank WooCommerce/Automattic for their incredibly quick response and fix of the vulnerability. If you are using WooCommerce, please update. For more info see: developer.woocommerce.com/2025/12/22/s...

Hack.Commit.Push Switzerland is just one week away! 🇨🇭 This is a great opportunity to get involved in Open Source projects like @assertj.github.io, with direct guidance from the maintainers!

🚀 GitHub is making Actions more secure by default We recently announced upcoming changes to the pull_request_target event and environment protection rules to make GitHub Actions more secure by default. We’ve opened a discussion to gather feedback 👇 🔗 github.com/orgs/communi...

🎉 It’s Friday at #EkoParty! Join us at the GitHub booth at 15:30 for the GitHub Quiz 🧠 Test your security knowledge, win exclusive GitHub swag, grab some stickers, and chat with our experts! 👉 gh.io/eko

We're taking action to make the npm supply chain stronger and harder to attack. 🛡️ Check out our plan to create a more secure future for the JavaScript community.👇 https://github.blog/security/supply-chain-security/our-plan-for-a-more-secure-npm-supply-chain/

Recent account takeovers and attacks on package registries are a wake-up call: it's time to raise the bar on authentication and secure publishing practices. Find out what npm is doing—and what steps you can take—to help secure the open source supply chain: github.blog/security/sup...

I have often stated that well-implemented memory tagging will be a game changer for memory corruptions. And it seems that with the next iPhone it's finally here: security.apple.com/blog/memory-...

What if attackers could hijack your coding agent through a simple GitHub issue? Prompt injections are a real and growing threat for VS Code Copilot Agent. Learn how these attacks work and how you can defend your environment. Read the full research: github.blog/security/vul...

Today I have a more serious topic than usual, please consider reposting for reach: My wife and I are urgently looking for a specialist in neuropediatrics or a similar field for our autistic child with a diagnosed, but not further specified, movement disorder [1/4]

🚀 GitHub is on a mission to supercharge open-source security! We've partnered with 71 key open-source projects, giving them tools, funding, and playbooks to boost security. 🔐 Want your project to be part of this effort? Now’s the time to get involved! 💪 🔗 Find out more: github.blog/open-source/...

Never change, Switzerland, never change. 😂 www.nzz.ch/meinung/schw...

I'm coming to Switzerland! Join me at the Microsoft Azure Zürich User Group in only a few weeks from now: www.meetup.com/de-DE/micros...

Our team member Man Yue Mo is back, showing a new way to bypass MTE protection on Android phones with CVE-2025-0072. github.blog/security/vul...

Next Monday I'm doing a 2h webinar on files as seen through the eyes of a cybersecurity researcher. This will cover useful stuff for programmers, more junior pentesters, and other tech enthusiasts who enjoy knowing how stuff works on a computer :) hexarcana.ch/lp/files/?ut...

In this demonstration I show the impact of CVE-2025-25291/CVE-2025-25292, an authentication bypass in ruby-saml used by high profile OSS projects such as GitLab. My team coordinated with both the ruby-saml maintainer and GitLab to get this vulnerability fixed and patches are available at gh.io/glfx

If you're using ruby-saml or omniauth-saml for SAML authentication make sure to update these libraries as fast as possible! Fixes for two critical authentication bypass vulnerabilities were published today (CVE-2025-25291 + CVE-2025-25292). github.blog/security/sig...

In this blog post, we detail newly discovered authentication bypass vulnerabilities in the ruby-saml library used for single sign-on (SSO) via SAML on the service provider (application) side. github.blog/security/sig...

Hello from the GitHub Security Lab! We are a team of security experts who cultivate a collaborative community where developers and security professionals come together to secure open source software.

Last year, I committed to uncovering critical vulnerabilities in Maven repositories. Now it’s time to share the findings: RCE in Sonatype Nexus, Cache Poisoning in JFrog Artifactory, and more! github.blog/security/vul...

mitmproxy 11.1 is out! 🥳 We now support *Local Capture Mode* on Windows, macOS, and - new - Linux! This allows users to intercept local applications even if they don't have proxy settings. More details are at mitmproxy.org/posts/local-.... Super proud of this team effort. 😃

🚀 CodeQL zero to hero part 4: Gradio case study is out! This time we dive into how I wrote CodeQL to support the @hf.co's Gradio framework, scaled the research to a thousand repositories on GitHub, and found 11 vulnerabilities. gh.io/codeql-part-4

My latest blog post is live! Check your Ruby on Rails applications for the use of params[:_json] nastystereo.com/security/rai...

My latest blog post is live! nastystereo.com/security/cro... Read how to send a cross-site POST without including a Content-Type header (without CORS). It even works with navigator.sendBeacon

I just wrote a new blog post! This is how I (ab)used a jailed file write bug in Tomcat/Spring. Enjoy! Remote Code Execution with Spring Properties :: srcincite.io/blog/2024/11...

I just published a new blog post sharing an improved Deserialization Gadget Chain for Ruby! It builds on the work of others, including Leonardo Giovanni, @ulldma.bsky.social and @vakzz.bsky.social nastystereo.com/security/rub...

If you're interested in the inner workings of unsafe deserialization in Ruby I got you covered with a blog post that explains in detail how a concrete gadget chain works: github.blog/2024-06-20-e... Including proof of concept exploits that work up to Ruby 3.3 for Oj (JSON), Ox (XML) and more.

If you're interested in the inner workings of unsafe deserialization in Ruby I got you covered with a blog post that explains in detail how a concrete gadget chain works: github.blog/2024-06-20-e... Including proof of concept exploits that work up to Ruby 3.3 for Oj (JSON), Ox (XML) and more.

The talk I have at @hack_lu about Yeti and our vision of the future of forensics intelligence is online! We're already getting lots of FRs, which we'll do our best to implement before our official release EOM. Hope I made @Sebdraven proud 🥹 #dfir #infosec

Where I'll demonstrate some typical Ruby on Rails gotchas on a real project: https://github.blog/2023-07-28-closing-vulnerabilities-in-decidim-a-ruby-based-citizen-participation-platform/ E.g. Why you shouldn't match strings with ^ and $ when using Regex in Ruby.

Head of cyber at the Romanian Intelligence Service: Solarwinds attack didn't impact Romania because companies didn't pay their support and were lagging behind so many versions the exploited vulnerability didn't apply