{"items":[{"id":"NVI-00018599","kind":"vulnerability","title":"matrix-sdk-ui: Incomplete edit validation","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-h97m-27fx-42rx","CVE-2026-45057"],"plain_summary":"GitHub lists this reviewed advisory for matrix-sdk-ui. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-425fd20c3464ba94aedb600516f89995"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-06-04T14:50:47.000Z","value":"4.9 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-425fd20c3464ba94aedb600516f89995"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-425fd20c3464ba94aedb600516f89995","url":"https://github.com/advisories/GHSA-h97m-27fx-42rx","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-h97m-27fx-42rx","publisher":"GitHub Advisory Database","observed_at":"2026-11-07T00:53:06.181Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-425fd20c3464ba94aedb600516f89995"],"technology":"matrix-sdk-ui","known_exclusions":[],"conditions_summary":"### Impact\nThe 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.\n\n### Patches\n`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.\n\n### Workarounds\nN/A\n\n### References\n* Pull request: https://github.com/matrix-org/matrix-rust-sdk/pull/6454\n\n### For more information\nIf you have any questions or comments about this advisory, please email us at security at matrix.org.\n\n[^1]: https://spec.matrix.org/unstable/client-server-api/#validity-of-replacement-events","public_affected_ranges":["< 0.16.1"]}],"null_published_at":"2026-11-07T07:07:39.860Z","source_updated_at":"2026-06-04T14:50:47.000Z","source_disclosed_at":"2026-06-04T14:50:47.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"First indexed by Null; source disclosure date is shown separately.","null_first_observed_at":"2026-11-07T00:53:06.181Z"}],"next_cursor":null,"snapshot_revision":"42594"}