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Important: admins of Conduit-derived homeservers (Conduit, Continuwuity, Grapevine and Tuwunel) should update immediately to address a critical bug in the federation implementation that is being actively exploited:

GitHub

Unintended Proxy or Intermediary ('Confused Deputy') and Improper Input Validation in Conduit-derived homeservers

### Impact This vulnerability allows a remote, unauthenticated attacker to force the target server to cryptographically sign arbitrary membershi...

The Holiday Special Matrix Live, open sourcing the policy server, and a security release for ESS. This concludes This Week In Matrix for this year!

This Week in Matrix 2025-12-19

Matrix, the open protocol for secure decentralised communications

We'll be at FOSDEM, and we have updates for you! 1. Excellent mentors signed up to our hackathon to help newcomers get started on Matrix 2. We have a booth with a solid team to staff it, but you can join the fun and help us 3. The Decentralised Communications Devroom we coordinate now has a schedule Find all the details on our blog!

FOSDEM Update

Matrix, the open protocol for secure decentralised communications

We've just released Matrix spec v1.17 (hopefully our last release before v2.0!) including a few new MSCs and some exciting usability improvements for the spec website! Read about it in the blog post:

Matrix v1.17 specification released

Matrix, the open protocol for secure decentralised communications

Calls in Extera Next, Matrix helping users in Northern Virginia and Matrix meetups at CCC in Hamburg. This and more happened This Week in Matrix!

This Week in Matrix 2025-12-12

Matrix, the open protocol for secure decentralised communications

📚️ Join us for a collaborative hackathon before FOSDEM! Our team of scientists created tools to help us fight Big Silo. But we need your help to unlock the crate they have sent us! Come learn, mentor, and contribute to our hackathon and earn (sur)prizes! 📆 Jan 30 🗺️ HSBXL, Brussels

Find us at FOSDEM

Matrix, the open protocol for secure decentralised communications

🧑‍🎨 Hackers, artists, project managers, writers wanted! Joins us as we fight against Big Silo in our Brussels hackathon right before FOSDEM. Come learn, contribute, and help our mighty scientists as we tinker our way to a free world. 📆 Jan 30 🗺️ HSBXL, Brussels

Find us at FOSDEM

Matrix, the open protocol for secure decentralised communications

Element X Android getting a boost, a hackathon right before FOSDEM, and a brand new Flutter client. That and much happened This Week in Matrix!

This Week in Matrix 2025-12-05

Matrix, the open protocol for secure decentralised communications

⌨️ Don't miss your chance to team up with people and scratch your Matrix itch! We organize a hackathon on Fri 30 Jan in Brussels right before FOSDEM. Come help us save the Federation from Big Silo that wants to take over the world!

Find us at FOSDEM

Matrix, the open protocol for secure decentralised communications

🧑‍🏫 This year again, we will have a massive presence at FOSDEM! Between our hackathon on Friday, our booth during FOSDEM, and the Decentralised Comms Devroom on Sunday, you'll have plenty of opportunities to meet the team and get involved!

Find us at FOSDEM

Matrix, the open protocol for secure decentralised communications