{
  "cveId": "CVE-2026-42926",
  "url": "https://patchblox.com/security/cve/CVE-2026-42926",
  "summary": "CVE-2026-42926 is fixed in 18 products on 1 platform, first by ALAS2023-2026-1714, released May 25, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "nginx: When NGINX Open Source is configured to proxy HTTP/2 traffic by setting proxy_http_version\u00A0to 2, and also uses proxy_...",
  "description": "When NGINX Open Source is configured to proxy HTTP/2 traffic by setting proxy_http_version\u00A0to 2, and also uses proxy_set_body, an attacker may be able to inject frame headers and payload bytes to the upstream peer.\u00A0 Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.",
  "published": "2026-05-13T16:16:49Z",
  "severity": "important",
  "epss": 0.00346,
  "epssPercentile": 0.28325,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "nginx",
      "release": "Debian 14",
      "fixedVersion": "1.30.0-4",
      "fix": "DEBIAN-CVE-2026-42926",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-42926",
      "released": "2026-05-27T17:38:13Z"
    },
    {
      "platform": "linux",
      "product": "nginx",
      "release": "amzn 2023",
      "fixedVersion": "1:1.30.1-1.amzn2023.0.1",
      "fix": "ALAS2023-2026-1714",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1714",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "nginx-all-modules",
      "release": "amzn 2023",
      "fixedVersion": "1:1.30.1-1.amzn2023.0.1",
      "fix": "ALAS2023-2026-1714",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1714",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "nginx-core",
      "release": "amzn 2023",
      "fixedVersion": "1:1.30.1-1.amzn2023.0.1",
      "fix": "ALAS2023-2026-1714",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1714",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "nginx-core-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:1.30.1-1.amzn2023.0.1",
      "fix": "ALAS2023-2026-1714",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1714",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "nginx-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:1.30.1-1.amzn2023.0.1",
      "fix": "ALAS2023-2026-1714",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1714",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "nginx-debugsource",
      "release": "amzn 2023",
      "fixedVersion": "1:1.30.1-1.amzn2023.0.1",
      "fix": "ALAS2023-2026-1714",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1714",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "nginx-filesystem",
      "release": "amzn 2023",
      "fixedVersion": "1:1.30.1-1.amzn2023.0.1",
      "fix": "ALAS2023-2026-1714",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1714",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "nginx-mod-devel",
      "release": "amzn 2023",
      "fixedVersion": "1:1.30.1-1.amzn2023.0.1",
      "fix": "ALAS2023-2026-1714",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1714",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "nginx-mod-http-image-filter",
      "release": "amzn 2023",
      "fixedVersion": "1:1.30.1-1.amzn2023.0.1",
      "fix": "ALAS2023-2026-1714",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1714",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "nginx-mod-http-image-filter-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:1.30.1-1.amzn2023.0.1",
      "fix": "ALAS2023-2026-1714",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1714",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "nginx-mod-http-perl",
      "release": "amzn 2023",
      "fixedVersion": "1:1.30.1-1.amzn2023.0.1",
      "fix": "ALAS2023-2026-1714",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1714",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "nginx-mod-http-perl-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:1.30.1-1.amzn2023.0.1",
      "fix": "ALAS2023-2026-1714",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1714",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "nginx-mod-http-xslt-filter",
      "release": "amzn 2023",
      "fixedVersion": "1:1.30.1-1.amzn2023.0.1",
      "fix": "ALAS2023-2026-1714",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1714",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "nginx-mod-http-xslt-filter-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:1.30.1-1.amzn2023.0.1",
      "fix": "ALAS2023-2026-1714",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1714",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "nginx-mod-mail",
      "release": "amzn 2023",
      "fixedVersion": "1:1.30.1-1.amzn2023.0.1",
      "fix": "ALAS2023-2026-1714",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1714",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "nginx-mod-mail-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:1.30.1-1.amzn2023.0.1",
      "fix": "ALAS2023-2026-1714",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1714",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "nginx-mod-stream",
      "release": "amzn 2023",
      "fixedVersion": "1:1.30.1-1.amzn2023.0.1",
      "fix": "ALAS2023-2026-1714",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1714",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "nginx-mod-stream-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:1.30.1-1.amzn2023.0.1",
      "fix": "ALAS2023-2026-1714",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1714",
      "released": "2026-05-25T09:00:00Z"
    }
  ],
  "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"
  }
}