{
  "fix": "ALAS2023-2026-2149",
  "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2149",
  "summary": "ALAS2023-2026-2149, released September 14, 2026, fixes 13 CVEs in ecs-service-connect-agent (version v1.39.1.0-1.amzn2023). None of them is reported as exploited. Patch Radar priority: High.",
  "platform": "linux",
  "type": "advisory",
  "title": "ecs-service-connect-agent security update",
  "released": "2026-09-14T09:00:00Z",
  "priority": "High",
  "priorityTier": 3,
  "priorityReason": "Closes CVE-2026-73512, high severity",
  "supported": true,
  "cveCount": 13,
  "exploitedCveCount": 0,
  "kevCveCount": 0,
  "ransomwareCveCount": 0,
  "maxEpss": 0.00873,
  "vendorAdvisory": "https://alas.aws.amazon.com/AL2023/ALAS-2026-2149.html",
  "appliesTo": [
    {
      "product": "ecs-service-connect-agent",
      "productUrl": "https://patchblox.com/security/product/linux/ecs-service-connect-agent",
      "release": "amzn 2023",
      "fixedVersion": "v1.39.1.0-1.amzn2023",
      "supported": true
    }
  ],
  "cves": [
    {
      "cveId": "CVE-2026-73512",
      "url": "https://patchblox.com/security/cve/CVE-2026-73512",
      "title": "ecs-service-connect-agent: Fixed a use-after-free in the QUIC HTTP datagram handler where late HTTP/3 datagrams could reference a stream decoder...",
      "priority": "High",
      "severity": "important",
      "epss": 0.00873,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-48521",
      "url": "https://patchblox.com/security/cve/CVE-2026-48521",
      "title": "ecs-service-connect-agent: An Envoy proxy handling HTTP/3 connections can dereference a null transport socket option during the selection of a c...",
      "priority": "High",
      "severity": "important",
      "epss": 0.00739,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-50572",
      "url": "https://patchblox.com/security/cve/CVE-2026-50572",
      "title": "ecs-service-connect-agent: Fixed a use-after-free in the ext_authz raw HTTP client where completing an authorization request could destroy the c...",
      "priority": "High",
      "severity": "important",
      "epss": 0.0068,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-73546",
      "url": "https://patchblox.com/security/cve/CVE-2026-73546",
      "title": "ecs-service-connect-agent: Fixed a stored cross-site scripting issue in the HTML stats interface (/stats?format=html) where dynamically named st...",
      "priority": "High",
      "severity": "important",
      "epss": 0.00618,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-73549",
      "url": "https://patchblox.com/security/cve/CVE-2026-73549",
      "title": "ecs-service-connect-agent: Fixed an abnormal process termination for scoped IPv6 client addresses in original DST clusters with HTTP/3.",
      "priority": "High",
      "severity": "important",
      "epss": 0.00618,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-73547",
      "url": "https://patchblox.com/security/cve/CVE-2026-73547",
      "title": "ecs-service-connect-agent: Fixed an abnormal process termination in the ext_authz filter when processing CONNECT requests without a :path pseudo...",
      "priority": "High",
      "severity": "important",
      "epss": 0.00554,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-73550",
      "url": "https://patchblox.com/security/cve/CVE-2026-73550",
      "title": "ecs-service-connect-agent: Fixed an HTTP/2 memory-exhaustion issue where discarded duplicate Host headers were not counted toward request-header...",
      "priority": "High",
      "severity": "important",
      "epss": 0.00552,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-73551",
      "url": "https://patchblox.com/security/cve/CVE-2026-73551",
      "title": "ecs-service-connect-agent: Fixed URL normalization of dot and dot-dot path segments containing parameters, which could cause access-control comp...",
      "priority": "High",
      "severity": "important",
      "epss": 0.00527,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-73553",
      "url": "https://patchblox.com/security/cve/CVE-2026-73553",
      "title": "ecs-service-connect-agent: Fixed an authorization bypass when ignore_path_parameters_in_path_matching was enabled, where a path such as /admin;x...",
      "priority": "High",
      "severity": "important",
      "epss": 0.00507,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-73513",
      "url": "https://patchblox.com/security/cve/CVE-2026-73513",
      "title": "ecs-service-connect-agent: Fixed a heap use-after-free where an untrusted upstream could send HTTP/2 response trailers without the END_STREAM fl...",
      "priority": "High",
      "severity": "important",
      "epss": 0.00493,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-73552",
      "url": "https://patchblox.com/security/cve/CVE-2026-73552",
      "title": "ecs-service-connect-agent: Fixed an issue where safe_regex matching treated accepted non-UTF-8 HTTP header bytes as a non-match; in RBAC policie...",
      "priority": "High",
      "severity": "important",
      "epss": 0.0049,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-73548",
      "url": "https://patchblox.com/security/cve/CVE-2026-73548",
      "title": "ecs-service-connect-agent: Fixed cross-user response poisoning involving generic, non-WebSocket HTTP upgrades, where request payload sent before...",
      "priority": "High",
      "severity": "important",
      "epss": 0.00465,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-73511",
      "url": "https://patchblox.com/security/cve/CVE-2026-73511",
      "title": "ecs-service-connect-agent: Fixed path matching for paths containing per-segment parameters, where Envoy and backends could select different reso...",
      "priority": "High",
      "severity": "important",
      "epss": 0.00376,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    }
  ],
  "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"
  }
}