{
  "cveId": "CVE-2024-37302",
  "url": "https://patchblox.com/security/cve/CVE-2024-37302",
  "summary": "CVE-2024-37302 is fixed in matrix-synapse on 1 platform by DEBIAN-CVE-2024-37302 (version 1.116.0-1), released December 3, 2024. It is not reported as exploited. Patch Radar priority: High.",
  "title": "matrix-synapse: Synapse is an open-source Matrix homeserver",
  "description": "Synapse is an open-source Matrix homeserver. Synapse versions before 1.106 are vulnerable to a disk fill attack, where an unauthenticated adversary can induce Synapse to download and cache large amounts of remote media. The default rate limit strategy is insufficient to mitigate this. This can lead to a denial of service, ranging from further media uploads/downloads failing to completely unavailability of the Synapse process, depending on how Synapse was deployed. Synapse 1.106 introduces a new \u0022leaky bucket\u0022 rate limit on remote media downloads to reduce the amount of data a user can request at a time. This does not fully address the issue, but does limit an unauthenticated user\u0027s ability to request large amounts of data to be cached.",
  "published": "2024-12-03T17:15:10Z",
  "severity": "high",
  "cvss": 7.5,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00596,
  "epssPercentile": 0.48727,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "matrix-synapse",
      "release": "Debian 14",
      "fixedVersion": "1.116.0-1",
      "fix": "DEBIAN-CVE-2024-37302",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2024-37302",
      "released": "2024-12-03T17:15:10Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}