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A logic error in the room key sharing functionality of matrix-js-sdk (aka Matrix Javascript SDK) before 12.4.1 allows a malicious Matrix homeserver present in an encrypted room to steal room encryption keys (via crafted Matrix protocol messages) that were originally sent by affected Matrix clients participating in that room. This allows the homeserver to decrypt end-to-end encrypted messages sent by affected clients.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade riot-webUpgrade element-web | Aug 22, 2024 | Sep 13, 2021 |
| Arch Linux | — | Upgrade to the latest version of Arch Linux | Jul 11, 2025 | Sep 13, 2021 |
| Debian | — | No solution exists | May 15, 2025 | Sep 13, 2021 |
| Freebsd | — | Upgrade element-webUpgrade cinnyUpgrade nheko | Nov 4, 2022 | Sep 13, 2021 |
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