Incomplete message edit validation in matrix-sdk-ui

{
  "id": "5d5d301c941187a062582536ebb2d5a2d2bdb60c2688939e2136158976b50727",
  "url": "https://osv.dev/vulnerability/RUSTSEC-2026-0158",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Incomplete message edit validation in matrix-sdk-ui",
    "summary": "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.",
    "evidence": "osv:RUSTSEC-2026-0158",
    "products": [
      {
        "name": {
          "value": "matrix-sdk-ui",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "0.16.1",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "RUSTSEC-2026-0158",
      "aliases": [
        "CVE-2026-45057",
        "GHSA-h97m-27fx-42rx",
        "RUSTSEC-2026-0158"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "SEMVER",
              "events": [
                {
                  "introduced": "0.0.0-0"
                },
                {
                  "fixed": "0.16.1"
                }
              ]
            }
          ],
          "package": {
            "name": "matrix-sdk-ui",
            "purl": "pkg:cargo/matrix-sdk-ui",
            "ecosystem": "crates.io"
          },
          "database_specific": {
            "cvss": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N",
            "source": "https://github.com/rustsec/advisory-db/blob/osv/crates/RUSTSEC-2026-0158.json",
            "categories": [],
            "informational": null
          },
          "ecosystem_specific": {
            "affects": {
              "os": [],
              "arch": [],
              "functions": []
            },
            "affected_functions": null
          }
        }
      ],
      "modified": "2026-10-12T18:00:14.300850042Z",
      "provider": "osv",
      "references": [
        "https://crates.io/crates/matrix-sdk-ui",
        "https://rustsec.org/advisories/RUSTSEC-2026-0158.html",
        "https://github.com/matrix-org/matrix-rust-sdk/pull/6454"
      ],
      "provider_metadata": {
        "license": "CC0-1.0"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-45057",
        "evidence": "/aliases"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 306453,
  "published_at": "2026-06-03T12:00:00+00:00"
}