{
  "cveId": "CVE-2026-28755",
  "url": "https://patchblox.com/security/cve/CVE-2026-28755",
  "summary": "CVE-2026-28755 is fixed in 29 products on 1 platform, first by libnginx-mod-http-geoip 1.24.0-2ubuntu7.7, released March 24, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "NGINX ngx_stream_ssl_module vulnerability",
  "description": "NGINX Plus and NGINX Open Source have a vulnerability in the ngx_stream_ssl_module module due to the improper handling of revoked certificates when configured with the ssl_verify_client on and ssl_ocsp on directives, allowing the TLS handshake to succeed even after an OCSP check identifies the certificate as revoked. \u00A0    Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.",
  "published": "2026-03-24T08:16:00Z",
  "severity": "Moderate",
  "cvss": 5.4,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N",
  "cwe": "Incorrect Authorization",
  "epss": 0.00138,
  "epssPercentile": 0.03203,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-28755",
  "fixes": [
    {
      "platform": "linux",
      "product": "libnginx-mod-http-geoip",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "1.24.0-2ubuntu7.7",
      "fix": "libnginx-mod-http-geoip 1.24.0-2ubuntu7.7",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-libnginx-mod-http-geoip-1.24.0-2ubuntu7.7",
      "released": "2026-03-24T08:16:00Z"
    },
    {
      "platform": "linux",
      "product": "libnginx-mod-http-geoip",
      "release": "Ubuntu 25.10 (questing)",
      "fixedVersion": "1.28.0-6ubuntu1.2",
      "fix": "libnginx-mod-http-geoip 1.28.0-6ubuntu1.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-questing-libnginx-mod-http-geoip-1.28.0-6ubuntu1.2",
      "released": "2026-03-24T08:16:00Z"
    },
    {
      "platform": "linux",
      "product": "libnginx-mod-http-image-filter",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "1.24.0-2ubuntu7.7",
      "fix": "libnginx-mod-http-image-filter 1.24.0-2ubuntu7.7",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-libnginx-mod-http-image-filter-1.24.0-2ubuntu7.7",
      "released": "2026-03-24T08:16:00Z"
    },
    {
      "platform": "linux",
      "product": "libnginx-mod-http-image-filter",
      "release": "Ubuntu 25.10 (questing)",
      "fixedVersion": "1.28.0-6ubuntu1.2",
      "fix": "libnginx-mod-http-image-filter 1.28.0-6ubuntu1.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-questing-libnginx-mod-http-image-filter-1.28.0-6ubuntu1.2",
      "released": "2026-03-24T08:16:00Z"
    },
    {
      "platform": "linux",
      "product": "libnginx-mod-http-perl",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "1.24.0-2ubuntu7.7",
      "fix": "libnginx-mod-http-perl 1.24.0-2ubuntu7.7",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-libnginx-mod-http-perl-1.24.0-2ubuntu7.7",
      "released": "2026-03-24T08:16:00Z"
    },
    {
      "platform": "linux",
      "product": "libnginx-mod-http-perl",
      "release": "Ubuntu 25.10 (questing)",
      "fixedVersion": "1.28.0-6ubuntu1.2",
      "fix": "libnginx-mod-http-perl 1.28.0-6ubuntu1.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-questing-libnginx-mod-http-perl-1.28.0-6ubuntu1.2",
      "released": "2026-03-24T08:16:00Z"
    },
    {
      "platform": "linux",
      "product": "libnginx-mod-http-xslt-filter",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "1.24.0-2ubuntu7.7",
      "fix": "libnginx-mod-http-xslt-filter 1.24.0-2ubuntu7.7",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-libnginx-mod-http-xslt-filter-1.24.0-2ubuntu7.7",
      "released": "2026-03-24T08:16:00Z"
    },
    {
      "platform": "linux",
      "product": "libnginx-mod-http-xslt-filter",
      "release": "Ubuntu 25.10 (questing)",
      "fixedVersion": "1.28.0-6ubuntu1.2",
      "fix": "libnginx-mod-http-xslt-filter 1.28.0-6ubuntu1.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-questing-libnginx-mod-http-xslt-filter-1.28.0-6ubuntu1.2",
      "released": "2026-03-24T08:16:00Z"
    },
    {
      "platform": "linux",
      "product": "libnginx-mod-mail",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "1.24.0-2ubuntu7.7",
      "fix": "libnginx-mod-mail 1.24.0-2ubuntu7.7",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-libnginx-mod-mail-1.24.0-2ubuntu7.7",
      "released": "2026-03-24T08:16:00Z"
    },
    {
      "platform": "linux",
      "product": "libnginx-mod-mail",
      "release": "Ubuntu 25.10 (questing)",
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      "fix": "libnginx-mod-mail 1.28.0-6ubuntu1.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-questing-libnginx-mod-mail-1.28.0-6ubuntu1.2",
      "released": "2026-03-24T08:16:00Z"
    },
    {
      "platform": "linux",
      "product": "libnginx-mod-stream",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "1.24.0-2ubuntu7.7",
      "fix": "libnginx-mod-stream 1.24.0-2ubuntu7.7",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-libnginx-mod-stream-1.24.0-2ubuntu7.7",
      "released": "2026-03-24T08:16:00Z"
    },
    {
      "platform": "linux",
      "product": "libnginx-mod-stream",
      "release": "Ubuntu 25.10 (questing)",
      "fixedVersion": "1.28.0-6ubuntu1.2",
      "fix": "libnginx-mod-stream 1.28.0-6ubuntu1.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-questing-libnginx-mod-stream-1.28.0-6ubuntu1.2",
      "released": "2026-03-24T08:16:00Z"
    },
    {
      "platform": "linux",
      "product": "libnginx-mod-stream-geoip",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "1.24.0-2ubuntu7.7",
      "fix": "libnginx-mod-stream-geoip 1.24.0-2ubuntu7.7",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-libnginx-mod-stream-geoip-1.24.0-2ubuntu7.7",
      "released": "2026-03-24T08:16:00Z"
    },
    {
      "platform": "linux",
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      "fix": "libnginx-mod-stream-geoip 1.28.0-6ubuntu1.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-questing-libnginx-mod-stream-geoip-1.28.0-6ubuntu1.2",
      "released": "2026-03-24T08:16:00Z"
    },
    {
      "platform": "linux",
      "product": "nginx",
      "release": "Debian 14",
      "fixedVersion": "1.28.3-2",
      "fix": "DEBIAN-CVE-2026-28755",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-28755",
      "released": "2026-03-24T15:16:33Z"
    },
    {
      "platform": "linux",
      "product": "nginx",
      "release": "Ubuntu 24.04.5 LTS (noble)",
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      "fix": "nginx 1.24.0-2ubuntu7.7",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-nginx-1.24.0-2ubuntu7.7",
      "released": "2026-03-24T08:16:00Z"
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    {
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      "url": "https://patchblox.com/security/fix/linux/ubuntu-questing-nginx-1.28.0-6ubuntu1.2",
      "released": "2026-03-24T08:16:00Z"
    },
    {
      "platform": "linux",
      "product": "nginx",
      "release": "amzn 2023",
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      "fix": "ALAS2023-2026-1540",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1540",
      "released": "2026-04-13T09:00:00Z"
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    {
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      "released": "2026-04-13T09:00:00Z"
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    {
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  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T19:12:23Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
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}