Peter Stöckli

Hey y'all! My direct team, Product Service Services at @github.com is looking for a senior security engineer. www.github.careers/careers-home...

Whatever your plans were today, it's emergency patch day now security-hub.ncsc.admin.ch#/posts/13083

Oh fuck a duck, there's a code signing intermediate in eMudhra compromise.

And here’s why. Full subordinate CA private keys leaked. blog.mozilla.org/security/202...

THIS IS NOT A DRILL. If you package/distribute/maintain root stores or chain verifiers, act immediately. If you know how to remove trust in a root, consider doing it now. Otherwise, prepare to update systems as patches/mitigations come. Go users, update to Go 1.27.3 or Go 1.26.10.

🙈

Built my own Linux distro because nothing out there met the requirements. I’d say that’s a pretty valid reason 😅

Teaching a Chromebook how to MTE. How cool is that? (Actually, I don't know, but I'm happy!)

Instructions unclear. Storing more Diesel at home.

AI-powered fuzzing is here. GitHub Security Lab’s Fuzzing Taskflow automates harness creation, coverage improvement, crash triage, and vulnerability reporting for open source projects. Read github.blog/security/app...

Love the energy 😅 >Is This A Joke? In The Auth Header? (F5 BIG-IP UnAuth Heap-Overflow to RCE CVE-2026-94127) labs.watchtowr.com/is-this-a-jo...

fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm jscvt fcma lrcpc dcpop sha3 sm3 sm4 asimddp sha512 sve asimdfhm dit uscat ilrcpc flagm sb dcpodp sve2 sveaes svepmull svebitp erm svesha3 svesm4 flagm2 frint svei8mm svebf16 i8m m bf16 dgh bti mte ecv afp mte3 wfxt 😲

Frisch verbloggt: Welche Sprachmodelle stecken hinter der neuen «KI» für das Bundesparlament? Antwort: je ein amerikanisches, chinesisches und europäisches Open Weight-Modell. techjournalismus.ch/welche-sprac...

Sorry ✋️ I don't believe in the kind of mumbo jumbo that makes it harder to write incorrect code

Less than a week to go! 🚀 Join me this Tuesday at PH Zürich to discover how AssertJ 4 is about breaking things (carefully) to make your testing life better. Come for the technical debt, stay for the drinks and networking! 🍻 www.jug.ch/html/events/...

AI agents that execute commands, browse the web, and coordinate with other agents are everywhere. But how do you know they're safe? We let you find out by hacking one yourself. Free, hands-on, and you can get started in under 2 minutes! Learn more in our latest blog. github.blog/security/hac...

A commit meant to "strengthen the crypto" in FreshRSS ended up removing the need for a correct password. Why? Longer SHA-256 nonce + bcrypt truncation at 72 bytes. A nice example of why secure systems are about composition, not just stronger primitives. pentesterlab.com/blog/freshrs...

Sign in with ANY password: How we used AI to break into a popular chat application, and other high-impact vulnerabilities. Read "How to scan for vulnerabilities with GitHub Security Lab’s open source AI-powered framework" github.blog/security/how...

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...

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