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{
  "affected": [
    {
      "database_specific": {
        "categories": [],
        "cvss": null,
        "informational": null
      },
      "ecosystem_specific": {
        "affected_functions": null,
        "affects": {
          "arch": [],
          "functions": [
            "matrix_sdk_crypto::Device::encrypt_event_raw",
            "matrix_sdk_crypto::OlmMachine::encrypt_content_for_devices"
          ],
          "os": []
        }
      },
      "package": {
        "ecosystem": "crates.io",
        "name": "matrix-sdk-crypto",
        "purl": "pkg:cargo/matrix-sdk-crypto"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.0.0-0"
            },
            {
              "fixed": "0.19.0"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "versions": []
    }
  ],
  "aliases": [
    "GHSA-45pr-7vv7-f64m"
  ],
  "database_specific": {
    "license": "CC0-1.0"
  },
  "details": "Using the `IdentityBasedStrategy` setting when calling\n`Device::encrypt_event_raw` or `OlmMachine::encrypt_content_for_devices` may\ncause a panic if the recipient does not have cross-signing keys.",
  "id": "RUSTSEC-2026-0318",
  "modified": "2026-10-01T20:25:27Z",
  "published": "2026-09-29T12:00:00Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://crates.io/crates/matrix-sdk-crypto"
    },
    {
      "type": "ADVISORY",
      "url": "https://rustsec.org/advisories/RUSTSEC-2026-0318.html"
    },
    {
      "type": "WEB",
      "url": "https://github.com/matrix-org/matrix-rust-sdk/pull/6670"
    },
    {
      "type": "WEB",
      "url": "https://github.com/matrix-org/matrix-rust-sdk/commit/01b45b51299821ab03fecf46741392780f118d49"
    }
  ],
  "related": [],
  "severity": [],
  "summary": "Sending custom to-device messages may panics"
}