CVE-2026-45057
MEDIUM4.9Incomplete message edit validation in matrix-sdk-ui
Published: 6/4/2026Modified: 6/4/2026
Description
The message edit validation logic in the matrix-sdk-ui crate before 0.16.1 is missing a check: when replacing an encrypted event, the replacement event itself is not required to be encrypted. This enables a malicious homeserver administrator (or an actor with equivalent power) to impersonate or spoof messages as if they were sent by a victim user.
Affected packages (2)
- crates.io/matrix-sdk-uifrom 0, < 0.16.1
- crates.io/matrix-sdk-ui>= 0.0.0-0, < 0.16.1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM4.9 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N |
References (6)
- PATCHhttps://crates.io/crates/matrix-sdk-ui
- PATCHhttps://github.com/matrix-org/matrix-rust-sdk
- WEBhttps://github.com/matrix-org/matrix-rust-sdk/pull/6454
- WEBhttps://github.com/matrix-org/matrix-rust-sdk/releases/tag/matrix-sdk-0.16.1
- WEBhttps://github.com/matrix-org/matrix-rust-sdk/security/advisories/GHSA-h97m-27fx-42rx
- WEBhttps://rustsec.org/advisories/RUSTSEC-2026-0158.html