{
  "cveId": "CVE-2026-27447",
  "url": "https://patchblox.com/security/cve/CVE-2026-27447",
  "summary": "CVE-2026-27447 is fixed in 26 products on 1 platform, first by DEBIAN-CVE-2026-27447, released April 3, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "OpenPrinting CUPS: Authorization bypass via case-insensitive group-member lookup",
  "description": "OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. In versions 2.4.16 and prior, CUPS daemon (cupsd) contains an authorization bypass vulnerability due to case-insensitive username comparison during authorization checks. The vulnerability allows an unprivileged user to gain unauthorized access to restricted operations by using a user with a username that differs only in case from an authorized user. At time of publication, there are no publicly available patches.",
  "published": "2026-04-03T15:16:00Z",
  "severity": "Moderate",
  "cvss": 6.3,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:N",
  "cwe": "Incorrect Authorization",
  "epss": 0.00295,
  "epssPercentile": 0.22274,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-27447",
  "fixes": [
    {
      "platform": "linux",
      "product": "cups",
      "release": "Debian 14",
      "fixedVersion": "2.4.17-1",
      "fix": "DEBIAN-CVE-2026-27447",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-27447",
      "released": "2026-04-03T22:16:25Z"
    },
    {
      "platform": "linux",
      "product": "cups",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "2.4.1op1-1ubuntu4.20",
      "fix": "cups 2.4.1op1-1ubuntu4.20",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-cups-2.4.1op1-1ubuntu4.20",
      "released": "2026-04-24T10:16:00Z"
    },
    {
      "platform": "linux",
      "product": "cups",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "2.4.7-1.2ubuntu7.13",
      "fix": "cups 2.4.7-1.2ubuntu7.13",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-cups-2.4.7-1.2ubuntu7.13",
      "released": "2026-04-24T10:16:00Z"
    },
    {
      "platform": "linux",
      "product": "cups",
      "release": "Ubuntu 25.10 (questing)",
      "fixedVersion": "2.4.12-0ubuntu3.9",
      "fix": "cups 2.4.12-0ubuntu3.9",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-questing-cups-2.4.12-0ubuntu3.9",
      "released": "2026-04-24T10:16:00Z"
    },
    {
      "platform": "linux",
      "product": "cups",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "2.4.16-1ubuntu1.2",
      "fix": "cups 2.4.16-1ubuntu1.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-cups-2.4.16-1ubuntu1.2",
      "released": "2026-04-24T10:16:00Z"
    },
    {
      "platform": "linux",
      "product": "cups",
      "release": "amzn 2023",
      "fixedVersion": "1:2.4.19-1.amzn2023.0.1",
      "fix": "ALAS2023-2026-1668",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1668",
      "released": "2026-05-11T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "cups",
      "release": "sles 15.7",
      "fixedVersion": "2.2.7-150000.3.93.1",
      "fix": "SUSE-SU-2026:2732-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-2732-1",
      "released": "2026-07-02T17:41:32Z"
    },
    {
      "platform": "linux",
      "product": "cups-bsd",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "2.4.1op1-1ubuntu4.20",
      "fix": "cups-bsd 2.4.1op1-1ubuntu4.20",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-cups-bsd-2.4.1op1-1ubuntu4.20",
      "released": "2026-04-24T10:16:00Z"
    },
    {
      "platform": "linux",
      "product": "cups-bsd",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "2.4.7-1.2ubuntu7.13",
      "fix": "cups-bsd 2.4.7-1.2ubuntu7.13",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-cups-bsd-2.4.7-1.2ubuntu7.13",
      "released": "2026-04-24T10:16:00Z"
    },
    {
      "platform": "linux",
      "product": "cups-bsd",
      "release": "Ubuntu 25.10 (questing)",
      "fixedVersion": "2.4.12-0ubuntu3.9",
      "fix": "cups-bsd 2.4.12-0ubuntu3.9",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-questing-cups-bsd-2.4.12-0ubuntu3.9",
      "released": "2026-04-24T10:16:00Z"
    },
    {
      "platform": "linux",
      "product": "cups-bsd",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "2.4.16-1ubuntu1.2",
      "fix": "cups-bsd 2.4.16-1ubuntu1.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-cups-bsd-2.4.16-1ubuntu1.2",
      "released": "2026-04-24T10:16:00Z"
    },
    {
      "platform": "linux",
      "product": "cups-client",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "2.4.1op1-1ubuntu4.20",
      "fix": "cups-client 2.4.1op1-1ubuntu4.20",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-cups-client-2.4.1op1-1ubuntu4.20",
      "released": "2026-04-24T10:16:00Z"
    },
    {
      "platform": "linux",
      "product": "cups-client",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "2.4.7-1.2ubuntu7.13",
      "fix": "cups-client 2.4.7-1.2ubuntu7.13",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-cups-client-2.4.7-1.2ubuntu7.13",
      "released": "2026-04-24T10:16:00Z"
    },
    {
      "platform": "linux",
      "product": "cups-client",
      "release": "Ubuntu 25.10 (questing)",
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      "fix": "cups-client 2.4.12-0ubuntu3.9",
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      "released": "2026-04-24T10:16:00Z"
    },
    {
      "platform": "linux",
      "product": "cups-client",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "2.4.16-1ubuntu1.2",
      "fix": "cups-client 2.4.16-1ubuntu1.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-cups-client-2.4.16-1ubuntu1.2",
      "released": "2026-04-24T10:16:00Z"
    },
    {
      "platform": "linux",
      "product": "cups-client",
      "release": "amzn 2023",
      "fixedVersion": "1:2.4.19-1.amzn2023.0.1",
      "fix": "ALAS2023-2026-1668",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1668",
      "released": "2026-05-11T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "cups-client-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:2.4.19-1.amzn2023.0.1",
      "fix": "ALAS2023-2026-1668",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1668",
      "released": "2026-05-11T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "cups-common",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "2.4.1op1-1ubuntu4.20",
      "fix": "cups-common 2.4.1op1-1ubuntu4.20",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-cups-common-2.4.1op1-1ubuntu4.20",
      "released": "2026-04-24T10:16:00Z"
    },
    {
      "platform": "linux",
      "product": "cups-common",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "2.4.7-1.2ubuntu7.13",
      "fix": "cups-common 2.4.7-1.2ubuntu7.13",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-cups-common-2.4.7-1.2ubuntu7.13",
      "released": "2026-04-24T10:16:00Z"
    },
    {
      "platform": "linux",
      "product": "cups-common",
      "release": "Ubuntu 25.10 (questing)",
      "fixedVersion": "2.4.12-0ubuntu3.9",
      "fix": "cups-common 2.4.12-0ubuntu3.9",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-questing-cups-common-2.4.12-0ubuntu3.9",
      "released": "2026-04-24T10:16:00Z"
    },
    {
      "platform": "linux",
      "product": "cups-common",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
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      "fix": "cups-common 2.4.16-1ubuntu1.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-cups-common-2.4.16-1ubuntu1.2",
      "released": "2026-04-24T10:16:00Z"
    },
    {
      "platform": "linux",
      "product": "cups-core-drivers",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
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      "fix": "cups-core-drivers 2.4.1op1-1ubuntu4.20",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-cups-core-drivers-2.4.1op1-1ubuntu4.20",
      "released": "2026-04-24T10:16:00Z"
    },
    {
      "platform": "linux",
      "product": "cups-core-drivers",
      "release": "Ubuntu 24.04.5 LTS (noble)",
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      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-cups-core-drivers-2.4.7-1.2ubuntu7.13",
      "released": "2026-04-24T10:16:00Z"
    },
    {
      "platform": "linux",
      "product": "cups-core-drivers",
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      "released": "2026-04-24T10:16:00Z"
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    {
      "platform": "linux",
      "product": "cups-core-drivers",
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      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-cups-core-drivers-2.4.16-1ubuntu1.2",
      "released": "2026-04-24T10:16:00Z"
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    {
      "platform": "linux",
      "product": "cups-daemon",
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    {
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      "release": "amzn 2023",
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      "fix": "ALAS2023-2026-1668",
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      "released": "2026-05-11T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "cups-filesystem",
      "release": "amzn 2023",
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      "fix": "ALAS2023-2026-1668",
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      "released": "2026-05-11T09:00:00Z"
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      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-cups-ipp-utils-2.4.1op1-1ubuntu4.20",
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    },
    {
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    {
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    {
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      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1668",
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    {
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    },
    {
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    {
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      "platform": "linux",
      "product": "cups-printerapp",
      "release": "amzn 2023",
      "fixedVersion": "1:2.4.19-1.amzn2023.0.1",
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    },
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    },
    {
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    },
    {
      "platform": "linux",
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      "fixedVersion": "2.4.7-1.2ubuntu7.13",
      "fix": "cups-server-common 2.4.7-1.2ubuntu7.13",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-cups-server-common-2.4.7-1.2ubuntu7.13",
      "released": "2026-04-24T10:16:00Z"
    },
    {
      "platform": "linux",
      "product": "cups-server-common",
      "release": "Ubuntu 25.10 (questing)",
      "fixedVersion": "2.4.12-0ubuntu3.9",
      "fix": "cups-server-common 2.4.12-0ubuntu3.9",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-questing-cups-server-common-2.4.12-0ubuntu3.9",
      "released": "2026-04-24T10:16:00Z"
    },
    {
      "platform": "linux",
      "product": "cups-server-common",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "2.4.16-1ubuntu1.2",
      "fix": "cups-server-common 2.4.16-1ubuntu1.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-cups-server-common-2.4.16-1ubuntu1.2",
      "released": "2026-04-24T10:16:00Z"
    },
    {
      "platform": "linux",
      "product": "libcups2",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "2.4.1op1-1ubuntu4.20",
      "fix": "libcups2 2.4.1op1-1ubuntu4.20",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-libcups2-2.4.1op1-1ubuntu4.20",
      "released": "2026-04-24T10:16:00Z"
    },
    {
      "platform": "linux",
      "product": "libcups2t64",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "2.4.7-1.2ubuntu7.13",
      "fix": "libcups2t64 2.4.7-1.2ubuntu7.13",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-libcups2t64-2.4.7-1.2ubuntu7.13",
      "released": "2026-04-24T10:16:00Z"
    },
    {
      "platform": "linux",
      "product": "libcups2t64",
      "release": "Ubuntu 25.10 (questing)",
      "fixedVersion": "2.4.12-0ubuntu3.9",
      "fix": "libcups2t64 2.4.12-0ubuntu3.9",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-questing-libcups2t64-2.4.12-0ubuntu3.9",
      "released": "2026-04-24T10:16:00Z"
    },
    {
      "platform": "linux",
      "product": "libcups2t64",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "2.4.16-1ubuntu1.2",
      "fix": "libcups2t64 2.4.16-1ubuntu1.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-libcups2t64-2.4.16-1ubuntu1.2",
      "released": "2026-04-24T10:16:00Z"
    },
    {
      "platform": "linux",
      "product": "libcupsimage2",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "2.4.1op1-1ubuntu4.20",
      "fix": "libcupsimage2 2.4.1op1-1ubuntu4.20",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-libcupsimage2-2.4.1op1-1ubuntu4.20",
      "released": "2026-04-24T10:16:00Z"
    },
    {
      "platform": "linux",
      "product": "libcupsimage2t64",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "2.4.7-1.2ubuntu7.13",
      "fix": "libcupsimage2t64 2.4.7-1.2ubuntu7.13",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-libcupsimage2t64-2.4.7-1.2ubuntu7.13",
      "released": "2026-04-24T10:16:00Z"
    },
    {
      "platform": "linux",
      "product": "libcupsimage2t64",
      "release": "Ubuntu 25.10 (questing)",
      "fixedVersion": "2.4.12-0ubuntu3.9",
      "fix": "libcupsimage2t64 2.4.12-0ubuntu3.9",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-questing-libcupsimage2t64-2.4.12-0ubuntu3.9",
      "released": "2026-04-24T10:16:00Z"
    },
    {
      "platform": "linux",
      "product": "libcupsimage2t64",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "2.4.16-1ubuntu1.2",
      "fix": "libcupsimage2t64 2.4.16-1ubuntu1.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-libcupsimage2t64-2.4.16-1ubuntu1.2",
      "released": "2026-04-24T10:16:00Z"
    }
  ],
  "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"
  }
}