The Open Source Technology Improvement Fund is proud to share the results of our security audit of zlib. Thanks to the efforts of 7ASecurity and the Sovereign Tech Fund, this project underwent a holistic security review. See 🧵 below 👇 #OSTIF #7ASecurity #audit #zlib

Join us in 2 weeks on Wednesday, February 25th, for an OSTIF meetup with Nadim Kobeissi, Senior Applied Cryptography Auditor at Cure53 presenting "High Assurance Cryptography and the Ethics of Disclosure". #OSTIF #OpenSource #disclosure

I'm giving a talk soon about my Cryspen findings, in collaboration with @ostifofficial.bsky.social. Happening online, will be live-streamed. Register here: luma.com/xc4yuezb?tk=...

This month's Community Spotlight shines on Peter Hunt, Principal Software Engineer at Red Hat who has contributed to both of OSTIF's audits of CRI-O (cri-o.io). Come check out our interview! ostif.org/feb-2026-com... #OSTIF #Spotlight #RedHat

🆓 🎉 It's Free Open Source Software Month! Learn open source skills for FREE! From Linux fundamentals to Kubernetes, secure software, and emerging tech, check out Linux Foundation Education’s free learning library today: training.linuxfoundation.org/resources/ #OSS #CloudNative #Linux #Kubernetes

We couldn't have done it without: @sovereign.tech @cncf.io @lfenergy.bsky.social @aswf.io @quarkslab.bsky.social @shielder.com @trailofbits.bsky.social @openssf.org @opensource.org @puerco.mx @funnelfiasco.bsky.social @nadim.computer @adamshostack.bsky.social @openforumeurope.org and so many more!

Presenting our 2025 annual report! In our report, you’ll see that OSTIF's story and mission are intertwined. OSTIF will continue to fight for open source infrastructure and the privacy rights of users for as many decades as you’ll let us. Our statement and report link: ostif.org/2025-annual-...

Congratulations to the Scala team for securing investment in open source infrastructure with the @sovereign.tech! We're proud to contribute to this effort, and look forward to the future of Scala and this endowment's positive impact: scala-lang.org/blog/2026/01...

@lfenergy.bsky.social EVerest underwent a security engagement facilitated by us with auditing by @quarkslab.bsky.social. This holistic security work impacts millions of EV charging stations worldwide. Read more at our blog: ostif.org/everest-secu...

We conducted the first public third-party security assessment of EVerest, an open-source firmware stack for electric vehicle charging stations, deployed in hundreds of thousands of charging points worldwide. The audit was mandated by @ostifofficial.bsky.social 🙏 blog.quarkslab.com/everest-secu...

Having previously undergone an OSTIF security audit in 2022, Cloud Native Computing Foundation (CNCF) project CRI-O received another review in late 2025. Security auditing was performed by X41 D-Sec GmbH, and their report is available to read on our blog: ostif.org/cri-o-audit-...

Releasing today is our security audit of Internet Systems Consortium's Kea project. The project received holistic security improvements and recommendations from Ada Logics. Read more about the work performed and results to the project at our blog: ostif.org/kea-security...

OSTIF is proud to announce our membership in the Open Policy Alliance, an organization dedicated to the uplifting of open source in public knowledge and understanding! Excited to be involved in the Open Source Initiative's advocacy. Ready about it at the press release: ostif.org/ostif-joins-...

Sorry for the hiccup with our tag in the previous post! Our thanks again to @ostifofficial.bsky.social for their help with this important audit, which you can again read about in our blog post: blog.thunderbird.net/2025/12/thun...

We are building tech you can trust. Thank you to @ostifofficial.bsky.social and 7A Security for their collaboration on the security audit for Thunderbird Send, our end-to-end encrypted file transfer service (coming to everyone soon, open source now). blog.thunderbird.net/2025/12/thun...

Miss last week's amazing audit meetup about OpenEXR from Shielder? Catch the video here www.youtube.com/watch?v=3PmW.... Make sure you attend the live events if you want to participate in the Q&A, as those aren't recorded!

OSTIF is proud to announce our audit of Mozilla Thunderbird-Send, with auditing by 7ASecurity. Not yet publicly released, this project will eventually be used in Mozilla email and web browsers. Read about the work done to prepare and harden this project at our blog: ostif.org/thunderbird-...

If you haven't met the OSTIF community and me, they have a special introduction for you. Check out OSTIF's Meet the Community video to learn more about my professional experience and envisioned changes for the open source community. Thanks to the OSTIF team for the great intro! shorturl.at/q9J8R

cool folks doing cool stuff - do not miss out!

@shielder.com security researchers Davide and Pietro will be presenting on their audit of OpenEXR next Tuesday, 13:00 CST. Join to hear about how a team at the top of their game is auditing high-value targets used in a billion dollar industry. RSVP here: luma.com/ir16fuig

I had the opportunity to meet up with members of the Open Source Technology Improvement Fund (OSTIF) where we discussed the benefits and tradeoffs of publishing threat models. Grateful to engage with this awesome community! Check out the recording from the meetup! 👉 shorturl.at/6uKfu

Quarkslab engineers Robin David, Mihail Kirov and Kaname just completed the first public security audit of Bitcoin Core, led by @ostifofficial.bsky.social and funded by Brink.dev Details on the blog post: blog.quarkslab.com/bitcoin-core... Congrats to developers for such software masterpiece !

We've been a bit excited about this one. We are excited and honored to have partnered with Bitcoin, brink, Chaincode Labs, and @quarkslab.bsky.social to collaborate on a security audit of Bitcoin Core. This was Bitcoin Core's first external audit. Read more at our blog: ostif.org/bitcoin-core...

We are pleased to announce that the KubeVirt Security Audit report has been published, in collaboration with @quarkslab.bsky.social and @ostifofficial.bsky.social Check out our blog post for all the details: kubevirt.io/2025/Announc...

#KubeCon day 1 keynotes: Amir Montaziry from @ostifofficial.bsky.social talking about securing open source projects and an update on the @kubernetes.io audit which I helped out with along with @iainsmart.bsky.social

OSTIF is proud to announce that our audit of @kubevirt.bsky.social is now public! This would not be possible without the contributions of Quarkslab and the Cloud Native Computing Foundation. Read about the work on our blog: ostif.org/kubevirt-aud...

Amir and Derek present Reflections on 10 Years: Celebrating the Open Source Technology Improvement Fund next Thursday, November 6th 13:00 CST. Hear our friends and collaborators in discussion with us about our past, present, and future. RSVP here: luma.com/nudnh5sv

Boo! Publish your threat models! 👻 Does that scare you? Join us Wednesday, Oct 29th at 14:00 CT with @adamshostack.bsky.social, who will be presenting on why transparency isn't something to be frightened of. RSVP to add straight to your calendar: luma.com/6fvp6orm

Should we publish our threat models? I explore a different lens with OSTIF for how transparency can benefit everyone. Oct 29, 14:00 CT 👉 luma.com/6fvp6orm

On November 6th at 13:00 CST, we are hosting "Reflections on 10 Years with OSTIF." Not just a reflection, this is a summation of our past, present, and future. RSVP to tell us your OSTIF experience, join in the celebration, or just to see what special guests we have joining: luma.com/nudnh5sv

This week's blog is "OSTIF's Strategy Plan". No holds barred, it's complete transparency of what our goals for the next 3-5 years are. If you've got 5 minutes to spare on this autumn Friday, you'll be caught up: ostif.org/ostifs-strat...

The @ostifofficial.bsky.social recently completed a security audit of #OpenSSFScorecard. With support from the OpenSSF, this audit covered five core repositories and included threat modelling, manual code review, and fuzz testing. . Read to learn more:🔗 openssf.org/blog/2025/10...

Publish your threat models! Not convinced? I'll be hosting a talk with OSTIF on Oct 29 @ 2pm CT for you to ask me questions. Register now and have your questions, thoughts, and comments ready! luma.com/6fvp6orm

Join us October 29th at 14:00 CST for a meetup with @adamshostack.bsky.social! RSVP here: luma.com/6fvp6orm First Adam will present on threat models (he literally wrote *the* book on the subject) and a Q&A portion will follow. We look forward to him and our community connecting!

🆕 🔐 Cybersecurity isn’t just for CISOs—every leader must frame cyber risk as business risk. LF’s Executive Education equips senior leaders to: 🔹 Turn risk into advantage 🔹 Build resilient teams 🔹 Leverage emerging tech apply now 👉 training.linuxfoundation.org/training/lfe... #CyberRisk

Duck, duck...goose (eggs)! OSTIF is honored to be a five time recipient of DuckDuckGo's Charitable Donations Program. Read about this donation and its impact on us at our blog: ostif.org/five-years-d...

We've got a GNU audit for you! GNU libmicrohttpd2 was audited thanks to @sovereign.tech and ADA Logics. The library underwent a threat modeling practice, fuzzing improvements, and a small cryptography review. Read about it on our blog: ostif.org/gnu-libmicro...

We're baaaccckkkkk... and this time, we have @adamshostack.bsky.social! Join us next month, Oct 29th 14:00 CST, for a meetup on threat modeling: developing them, using them, and publishing them. RSVP to attend: luma.com/6fvp6orm

RTFM they say but if you read the manual and copy code examples from it you may inadvertently introduce vulns in your code 🙀 In April we audited the PHP code. Now we followed up with a review of the code snippets in PHP documentation and found 81 issues 👇 blog.quarkslab.com/security-rev...

Join us in celebrating our first Community Spotlight honorees, David Korczynski and Adam Korczynski! Learn more about these brothers and business partners in our Community Spotlight post: ostif.org/001-2025-com...

Start your workweek with a bit of rumination and OSTIF's latest blog post: "Open Source Summit and OpenSSF Community Day EU 2025 Reflection" ostif.org/ossummit-com...

@openssf.org Community Day aka the big day for us! Amir will participating in a tabletop exercise at 15:40 and Helen will be speaking on our audit of RSTUF at 10:50. Check out the rest of the schedule here: events.linuxfoundation.org/openssf-comm...

Bridging the gap between open source project security and foundations- its what we do. "The Bridge to Improving Security: How OSTIF Helps Foundations" is live now on our blog: ostif.org/ostif-helps-...

thank you to the @openssf.org for the opportunity to chat about our work and mission on "What's in the SOSS?" Listen on your preferred podcasting app: openssf.org/podcast/2025...

Our team recently completed three security audits of Permuto for @chia.net. You can read the full report, including our findings, here: leastauthority.com/blog/audit-o...

We're thrilled to have Amir Montazery, Managing Director for @ostifofficial.bsky.social, presenting "Success Stories in Open Source: Third Party Security Audits" at #AllThingsOpen! 2025.allthingsopen.org/sessions/2-f...

We thought it would be timely to make a statement about our involvement with and position re: @OpenForumEurope EU-STF report. Get our thoughts at the blog: ostif.org/eu-stf-and-o...

Our Managing Director Amir will be speaking at the @aswf.io Open Source Days on Sunday! RSVP at sched.co/25j6n to hear about why "Security Audits Aren't Scary", and how renewable security efforts help projects, foundations, and the open source community!

In partnership with @aswf.io, OSTIF and @shielder.com worked on audits of MaterialX and OpenEXR. Our deepest gratitude for this opportunity to work with incredible maintainers and cool projects such as these- read about them at our blogs: ostif.org/materialx-au..., ostif.org/openexr-audi...

🚨 New Open Source Audit Alert! 🚨 Shielder, with @ostifofficial.bsky.social & ASWF audited OpenEXR and MaterialX: 🔍 11 issues found (1 critical, 3 still to be published) ✔️ Most fixed, others planned 🗣️ ndaprela @smaury.bsky.social @suidpit.bsky.social @thezero.org Full details in the blog post ⬇️🧵