{
  "cveId": "CVE-2026-59903",
  "url": "https://patchblox.com/security/cve/CVE-2026-59903",
  "summary": "CVE-2026-59903 is fixed in 5 products on 1 platform, first by RHSA-2026:92059, released August 17, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "eap8-netty: Netty is an asynchronous, event-driven network application framework",
  "description": "Netty is an asynchronous, event-driven network application framework. Prior to 4.1.137.Final and 4.2.17.Final, io.netty.handler.codec.http.cors.CorsHandler setVaryHeader replaces application Vary headers such as Authorization or Cookie with Origin, allowing a caching proxy or CDN to reuse authenticated responses across users and disclose sensitive information. This issue is fixed in versions 4.1.137.Final and 4.2.17.Final.",
  "published": "2026-08-17T17:56:28Z",
  "severity": "moderate",
  "cvss": 6.5,
  "epss": 0.00324,
  "epssPercentile": 0.25564,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "eap8-netty",
      "release": "RHEL 10",
      "fixedVersion": "4.1.138-1.Final_redhat_00001.1.el10eap",
      "fix": "RHSA-2026:92059",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-92059",
      "released": "2026-08-17T17:56:28Z"
    },
    {
      "platform": "linux",
      "product": "eap8-netty-transport-native-epoll",
      "release": "RHEL 10",
      "fixedVersion": "4.1.138-1.Final_redhat_00001.1.el10eap",
      "fix": "RHSA-2026:92059",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-92059",
      "released": "2026-08-17T17:56:28Z"
    },
    {
      "platform": "linux",
      "product": "eap8-resteasy",
      "release": "RHEL 10",
      "fixedVersion": "6.2.19-1.Final_redhat_00002.1.el10eap",
      "fix": "RHSA-2026:92059",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-92059",
      "released": "2026-08-17T17:56:28Z"
    },
    {
      "platform": "linux",
      "product": "netty",
      "release": "sles 15.7",
      "fixedVersion": "4.1.138-150200.4.56.1",
      "fix": "SUSE-SU-2026:4391-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-4391-1",
      "released": "2026-09-29T11:47:41Z"
    },
    {
      "platform": "linux",
      "product": "netty-tcnative",
      "release": "sles 15.6",
      "fixedVersion": "2.0.84-150200.3.51.1",
      "fix": "SUSE-SU-2026:4391-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-4391-1",
      "released": "2026-09-29T11:47:41Z"
    },
    {
      "platform": "linux",
      "product": "netty-tcnative",
      "release": "sles 15.7",
      "fixedVersion": "2.0.84-150200.3.51.1",
      "fix": "SUSE-SU-2026:4391-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-4391-1",
      "released": "2026-09-29T11:47:41Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}