{
  "cveId": "CVE-2025-66220",
  "url": "https://patchblox.com/security/cve/CVE-2025-66220",
  "summary": "CVE-2025-66220 is fixed in ecs-service-connect-agent on 1 platform by ALAS2023-2025-1357 (version v1.34.4.2-1.amzn2023), released January 7, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "ecs-service-connect-agent: Envoy is a high-performance edge/middle/service proxy",
  "description": "Envoy is a high-performance edge/middle/service proxy. In 1.33.12, 1.34.10, 1.35.6, 1.36.2, and earlier, Envoy\u0027s mTLS certificate matcher for match_typed_subject_alt_names may incorrectly treat certificates containing an embedded null byte (\\0) inside an OTHERNAME SAN value as valid matches.",
  "published": "2026-01-07T18:41:00Z",
  "severity": "important",
  "epss": 0.0018,
  "epssPercentile": 0.0763,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "ecs-service-connect-agent",
      "release": "amzn 2023",
      "fixedVersion": "v1.34.4.2-1.amzn2023",
      "fix": "ALAS2023-2025-1357",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2025-1357",
      "released": "2026-01-07T18:41:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-11T13:47:35Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}