Lars Wirzenius discusses his innovative CI/CD system Ambient, which uses isolated virtual machines without network access to enhance security, and his work on Radicle, a peer-to-peer Git collaboration platform. Together, these projects offer a glimpse into a more distributed future for software development, addressing key challenges in current CI/CD systems like long wait times, security vulnerabilities, and centralized infrastructure limitations.

The blog post for this episode can be found at https://opensourcesecurity.io/2025/2025-03-ambient-radicle-lars-wirzenius/

William Brown tells us all about how confusing and complicated the FIDO authentication universe is. He talks about WebAuthn implementation challenges to flaws in the FIDO metadata service that affect how hardware tokens are authenticated against. The conversation covers the spectrum of hardware security key quality, attestation mechanisms, and the barriers preventing open source developers from improving industry standards despite their expertise.

The blog post for this episode can be found at https://opensourcesecurity.io/2025/2025-03-fido_auth_william_brown/

In this episode, open source legal expert Luis Villa breaks down what the EU's Cyber Resilience Act means for developers and businesses, exploring carve-outs for individual contributors and the complex relationship between security and sustainability. Luis provides practical guidance on navigating this evolving regulatory landscape while explaining why the CRA represents both a challenge and an opportunity for the open source ecosystem.

The blog post for this episode can be found at

https://opensourcesecurity.io/2025/2025-03-CRA_luis_villa/

Brian Fox discusses findings from a recent Sonatype report about the growing challenge of malicious packages in open source repositories. At the time of recording there are now over 820,000 malware packages in public repositories. Brian explains why certain ecosystems are more vulnerable than others and how behavioral detection methods can identify suspicious packages, and the challenge in solving this problem.

The blog post for this episode can be found at https://opensourcesecurity.io/2025/2025-03-oss_malware_brian_fox/

In this episode Open Source Security talks to Dr. Kelly Masada about the Open Information Security Foundation (OISF). The way OISF is managing Suricata through a foundation is super interesting. There are a lot of lessons in this one for both open source projects and existing open source foundations.

In this episode Open Source Security chats with Sheogorath about HedgeDoc project's journey from HackMD to CodiMD and finally to HedgeDoc. We learn what forking a project looks like, including license changes (MIT to AGPL), security vulnerability management across different codebases, naming challenges, and infrastructure migrations. The conversation goes through to journey from HackMD to CodiMD and all the lessons learned along the way. And there are many lessons.

The blog post for this episode can be found at  https://opensourcesecurity.io/2025/2025-02-fork_open_source_sheogorath/

In this episode, Open Source Security chats with Aaron Frost, CEO of Hero Devs about the world of maintaining end-of-life open source software. Aaron explains how EOL versions of open source work and how backporting security fixes can help maintaining compliance. In the discussion we cover the "just upgrade" mentality, how backporting works, why it's hard, and why it matters. We also cover some oddities the world of CVE brings to the discussion.

The blog post for this episode can be found at  https://opensourcesecurity.io/2025/2025-02-patching_EOL_OSS_aaron_frost/

François Proulx, a supply chain security researcher at Boost Security, discusses how continuous integration (CI) and build pipeline security represents a critical and overlooked hole in our supply chain security. It seems like most supply chain compromises are actually from CI system breaches rather than direct code compromise, yet we seem to obsess over everything on either side of the CI system. François has a bunch of really good practical suggestions for how we can start to improve our CI security today.

The blog post for this episode can be found at https://opensourcesecurity.io/2025/2025-02-ignoring_ci_security_francois_proulx/

In this discussion with Tremolo Security CTO Marc Boorshtein, we explore what modern day Single Sign-On (SSO) looks like. Everyone likes to talk about zero trust, but how does that work? We talk about some of the history of authentication that got us here, and some technical details on how you should be implementing authentication into your application. We finish up with some passkey details and realize every authentication discussion really just turns into complaining how hard identity is.

The blog post for this episode can be found at

https://opensourcesecurity.io/2025/2025-02-modern_day_authentication_with_marc_boorshtein/

Dick Brooks from Business Cyber Guardian discusses the landscape of federal software security requirements, we discuss frameworks like CISA's Software Acquisition Guide, Secure Software Development Framework, and the EU's Cyber Resilience Act. These regulations impact open source projects differently from commercial vendors, Dick helps explain what that means for the vendors as well as open source developers.

The accompaning blog can be found at

https://opensourcesecurity.io/2025/01-government_security_requirements_with_dick_brooks

CISA Software Acquisition Guide CISA SAG Reader Project NASA SSDF collaboration