Matrix-org Matrix-rust-sdk vulnerabilities
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Published CVEs affecting Matrix-org Matrix-rust-sdk: 2 record(s), with affected versions and fixes.
CVE-2026-45056
Medium · 6.9
CWE-290 Sep 11, 2026
Matrix Rust SDK: Sender-binding gaps in to-device and room-key attribution
matrix-sdk-crypto is a no-network-IO implementation of a state machine that handles end-to-end encryption for Matrix clients. Starting in version 0.12.0 and prior to version 0.17.0, the matrix-sdk-crypto crate was missing a check for the user ID when decrypting an Olm-encrypted event containing the `sender_device_keys` property. This could be exploited to forge an encrypted to-device event, but only if the attacker colludes with the homeserver operator. This issue is fixed in matrix-sdk-crypto 0.17.0. There are no known workarounds for the issue.
CVE-2025-66622
High · 7.5
CWE-755 Dec 9, 2025
matrix-sdk-base is vulnerable to DoS via custom m.room.join_rules event values
matrix-sdk-base is the base component to build a Matrix client library. Versions 0.14.1 and prior are unable to handle responses that include custom m.room.join_rules values due to a serialization bug. This can be exploited to cause a denial-of-service condition, if a user is invited to a room with non-standard join rules, the crate's sync process will stall, preventing further processing for all rooms. This is fixed in version 0.16.0.