matrix.org/content/blog/2022/09/2022-09-23-pre-disclosure-u...

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title = "Pre-disclosure: upcoming critical security release of Matrix SDKs and clients"
date = "2022-09-23T14:53:12Z"
path = "/blog/2022/09/23/pre-disclosure-upcoming-critical-security-release-of-matrix-sd-ks-and-clients"
[taxonomies]
author = ["Matrix Security Team"]
category = ["Security"]
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We will be releasing a security update to matrix-js-sdk, matrix-ios-sdk and matrix-android-sdk2 and clients which implement end-to-end encryption with these libraries, to patch **critical** security issues, on **Wed, Sept 28th**. The releases will be published in the afternoon, followed by the disclosure blog post around 16:00 UTC. The affected clients include Element Web, Desktop, iOS and Android. We will also be working with downstream packagers and forks over the coming days to ensure a synchronised release to address affected clients.
Clients using matrix-rust-sdk, hydrogen-sdk and matrix-nio are not affected by these critical issues. We are also auditing third-party client SDKs and clients in advance of the release, and will work with the projects if action is needed. So far we've confirmed that other popular SDK/clients including mtxclient (nheko), Matrix Dart SDK (FluffyChat), Trixnity (Timmy), Syphon, mautrix-go (Gomuks) and mautrix-python are not affected by the issues in question.
If you maintain or package a (potentially) affected E2EE-capable Matrix client and need to coordinate on the release, please contact <security@matrix.org>.
**We advise to upgrade as soon as possible after the patched versions are released.**
Thank you for your patience while we work to resolve this issue.