GitHub Advisoryadvisory · crates.io

GHSA-h97m-27fx-42rx matrix-sdk-ui: Incomplete edit validation

MEDIUM Published 2026-06-04 Modified 2026-06-04 Official page ↗
Aliases
CVE-2026-45057
Ecosystem
crates.io
Packages
matrix-sdk-ui
Severity
Moderate
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
Weaknesses
CWE-345
Reviewed
2026-06-04

Affected packages

• crates.io matrix-sdk-ui: < 0.16.1 → fixed in 0.16.1

Description

Impact 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. Patches `matrix-sdk-ui` 0.16.1 fixes the message edit validation logic to align with the algorithm for replacement events[^1] described in the Matrix specification. Workarounds N/A References • Pull request: https://github.com/matrix-org/matrix-rust-sdk/pull/6454 For more information If you have any questions or comments about this advisory, please email us at security at matrix.org. [^1]: https://spec.matrix.org/unstable/client-server-api/#validity-of-replacement-events

Related

Alias · CVE (1)

  • CVE-2026-45057 matrix-sdk-ui provides GUI-centric utilities on top of matrix-rust-sdk. vulnerability

Weakness · CWE (1)

  • CWE-345 Insufficient Verification of Data Authenticity weakness

References