CVE-2026-45056
Matrix Rust SDK: Sender-binding gaps in to-device and room-key attribution
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-290 |
| Vendor | matrix-org |
| Product | matrix-rust-sdk |
| Published | Sep 11, 2026 |
| Last Updated | Sep 14, 2026 |
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Affected Versions
matrix-org / matrix-rust-sdk
>= 0.12.0, < 0.16.1
References
github.com: https://github.com/matrix-org/matrix-rust-sdk/security/advisories/GHSA-wfq4-36m3-9g42 github.com: https://github.com/matrix-org/matrix-rust-sdk/pull/6553 github.com: https://github.com/matrix-org/matrix-rust-sdk/releases/tag/matrix-sdk-0.16.1 rustsec.org: https://rustsec.org/advisories/RUSTSEC-2026-0159.html