{
  "cveId": "CVE-2026-40164",
  "url": "https://patchblox.com/security/cve/CVE-2026-40164",
  "summary": "CVE-2026-40164 is fixed in 5 products on 1 platform, first by jq 1.5\u002Bdfsg-2ubuntu0.1~esm3, released April 13, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "jq: Algorithmic complexity DoS via hardcoded MurmurHash3 seed",
  "description": "jq is a command-line JSON processor. Before commit 0c7d133c3c7e37c00b6d46b658a02244fdd3c784, jq used MurmurHash3 with a hardcoded, publicly visible seed (0x432A9843) for all JSON object hash table operations, which allowed an attacker to precompute key collisions offline. By supplying a crafted JSON object (~100 KB) where all keys hashed to the same bucket, hash table lookups degraded from O(1) to O(n), turning any jq expression into an O(n\u00B2) operation and causing significant CPU exhaustion. This affected common jq use cases such as CI/CD pipelines, web services, and data processing scripts, and was far more practical to exploit than existing heap overflow issues since it required only a small payload. This issue has been patched in commit 0c7d133c3c7e37c00b6d46b658a02244fdd3c784.",
  "published": "2026-04-13T17:16:00Z",
  "severity": "Important",
  "cvss": 8.2,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
  "cwe": "Use of Weak Hash",
  "epss": 0.00366,
  "epssPercentile": 0.30586,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40164",
  "fixes": [
    {
      "platform": "linux",
      "product": "jq",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "1.6-2.1\u002Bdeb12u2",
      "fix": "DEBIAN-CVE-2026-40164",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-40164",
      "released": "2026-04-14T00:16:07Z"
    },
    {
      "platform": "linux",
      "product": "jq",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "1.7.1-6\u002Bdeb13u2",
      "fix": "DEBIAN-CVE-2026-40164",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-40164",
      "released": "2026-04-14T00:16:07Z"
    },
    {
      "platform": "linux",
      "product": "jq",
      "release": "Debian 14",
      "fixedVersion": "1.8.1-5",
      "fix": "DEBIAN-CVE-2026-40164",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-40164",
      "released": "2026-04-14T00:16:07Z"
    },
    {
      "platform": "linux",
      "product": "jq",
      "release": "Fedora 43",
      "fixedVersion": "1.8.1-3.fc43",
      "fix": "FEDORA-2026-4E57162966",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-4e57162966",
      "released": "2026-04-16T14:02:18Z"
    },
    {
      "platform": "linux",
      "product": "jq",
      "release": "RHEL 10",
      "fixedVersion": "1.7.1-8.el10_0.3",
      "fix": "RHSA-2026:18040",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-18040",
      "released": "2026-04-13T23:40:12Z"
    },
    {
      "platform": "linux",
      "product": "jq",
      "release": "RHEL 8",
      "fixedVersion": "0:1.6-12.el8_10",
      "fix": "RHSA-2026:16252",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-16252",
      "released": "2026-05-15T16:01:54Z"
    },
    {
      "platform": "linux",
      "product": "jq",
      "release": "RHEL 9",
      "fixedVersion": "0:1.6-19.el9_8.2",
      "fix": "RHSA-2026:19365",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-19365",
      "released": "2026-05-15T16:04:04Z"
    },
    {
      "platform": "linux",
      "product": "jq",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1.5\u002Bdfsg-2ubuntu0.1~esm3",
      "fix": "jq 1.5\u002Bdfsg-2ubuntu0.1~esm3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-jq-1.5-dfsg-2ubuntu0.1-esm3",
      "released": "2026-04-13T17:16:00Z"
    },
    {
      "platform": "linux",
      "product": "jq",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "1.6-1ubuntu0.20.04.1\u002Besm2",
      "fix": "jq 1.6-1ubuntu0.20.04.1\u002Besm2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-jq-1.6-1ubuntu0.20.04.1-esm2",
      "released": "2026-04-13T17:16:00Z"
    },
    {
      "platform": "linux",
      "product": "jq",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1.6-2.1ubuntu3.2",
      "fix": "jq 1.6-2.1ubuntu3.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-jq-1.6-2.1ubuntu3.2",
      "released": "2026-04-13T17:16:00Z"
    },
    {
      "platform": "linux",
      "product": "jq",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "1.7.1-3ubuntu0.24.04.2",
      "fix": "jq 1.7.1-3ubuntu0.24.04.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-jq-1.7.1-3ubuntu0.24.04.2",
      "released": "2026-04-13T17:16:00Z"
    },
    {
      "platform": "linux",
      "product": "jq",
      "release": "Ubuntu 25.10 (questing)",
      "fixedVersion": "1.8.1-3ubuntu1.1",
      "fix": "jq 1.8.1-3ubuntu1.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-questing-jq-1.8.1-3ubuntu1.1",
      "released": "2026-04-13T17:16:00Z"
    },
    {
      "platform": "linux",
      "product": "jq",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "1.8.1-4ubuntu2",
      "fix": "jq 1.8.1-4ubuntu2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-jq-1.8.1-4ubuntu2",
      "released": "2026-04-13T17:16:00Z"
    },
    {
      "platform": "linux",
      "product": "jq",
      "release": "almalinux 10",
      "fixedVersion": "1.7.1-11.el10_2.2",
      "fix": "ALSA-2026:19151",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-19151",
      "released": "2026-05-19T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "jq",
      "release": "almalinux 8",
      "fixedVersion": "1.6-12.el8_10",
      "fix": "ALSA-2026:16252",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-16252",
      "released": "2026-05-12T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "jq",
      "release": "almalinux 9",
      "fixedVersion": "1.6-19.el9_8.2",
      "fix": "ALSA-2026:19365",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-19365",
      "released": "2026-05-19T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "jq",
      "release": "amzn 2023",
      "fixedVersion": "1.8.1-59.amzn2023",
      "fix": "ALAS2023-2026-1815",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1815",
      "released": "2026-06-08T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "jq",
      "release": "ol 10",
      "fixedVersion": "0:1.7.1-11.el10_1.0.2",
      "fix": "ELSA-2026-16692",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-16692",
      "released": "2026-05-13T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "jq",
      "release": "ol 8",
      "fixedVersion": "0:1.6-12.el8_10",
      "fix": "ELSA-2026-16252",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-16252",
      "released": "2026-05-13T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "jq",
      "release": "ol 9",
      "fixedVersion": "0:1.6-19.el9_7.0.2",
      "fix": "ELSA-2026-16693",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-16693",
      "released": "2026-05-13T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "jq",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "1.7.1-160000.3.1",
      "fix": "OPENSUSE-SU-2026:21248-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-21248-1",
      "released": "2026-07-07T12:32:56Z"
    },
    {
      "platform": "linux",
      "product": "jq",
      "release": "rocky 10",
      "fixedVersion": "0:1.7.1-11.el10_2.2",
      "fix": "RLSA-2026:19151",
      "url": "https://patchblox.com/security/fix/linux/rlsa-2026-19151",
      "released": "2026-05-29T16:03:26Z"
    },
    {
      "platform": "linux",
      "product": "jq",
      "release": "rocky 8",
      "fixedVersion": "0:1.6-12.el8_10",
      "fix": "RLSA-2026:16252",
      "url": "https://patchblox.com/security/fix/linux/rlsa-2026-16252",
      "released": "2026-05-14T18:01:08Z"
    },
    {
      "platform": "linux",
      "product": "jq",
      "release": "rocky 9",
      "fixedVersion": "0:1.6-19.el9_8.2",
      "fix": "RLSA-2026:19365",
      "url": "https://patchblox.com/security/fix/linux/rlsa-2026-19365",
      "released": "2026-05-28T15:43:09Z"
    },
    {
      "platform": "linux",
      "product": "jq",
      "release": "sles 15.6",
      "fixedVersion": "1.7.1-150000.3.25.1",
      "fix": "SUSE-SU-2026:4275-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-4275-1",
      "released": "2026-09-21T07:33:03Z"
    },
    {
      "platform": "linux",
      "product": "jq",
      "release": "sles 15.7",
      "fixedVersion": "1.7.1-150000.3.25.1",
      "fix": "SUSE-SU-2026:4275-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-4275-1",
      "released": "2026-09-21T07:33:03Z"
    },
    {
      "platform": "linux",
      "product": "jq",
      "release": "sles 16.0",
      "fixedVersion": "1.7.1-160000.3.1",
      "fix": "SUSE-SU-2026:22566-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-22566-1",
      "released": "2026-07-07T12:32:43Z"
    },
    {
      "platform": "linux",
      "product": "jq-debuginfo",
      "release": "Fedora 43",
      "fixedVersion": "1.8.1-3.fc43",
      "fix": "FEDORA-2026-4E57162966",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-4e57162966",
      "released": "2026-04-16T14:02:18Z"
    },
    {
      "platform": "linux",
      "product": "jq-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1.8.1-59.amzn2023",
      "fix": "ALAS2023-2026-1815",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1815",
      "released": "2026-06-08T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "jq-debugsource",
      "release": "Fedora 43",
      "fixedVersion": "1.8.1-3.fc43",
      "fix": "FEDORA-2026-4E57162966",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-4e57162966",
      "released": "2026-04-16T14:02:18Z"
    },
    {
      "platform": "linux",
      "product": "jq-debugsource",
      "release": "amzn 2023",
      "fixedVersion": "1.8.1-59.amzn2023",
      "fix": "ALAS2023-2026-1815",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1815",
      "released": "2026-06-08T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "jq-devel",
      "release": "Fedora 43",
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      "fix": "FEDORA-2026-4E57162966",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-4e57162966",
      "released": "2026-04-16T14:02:18Z"
    },
    {
      "platform": "linux",
      "product": "jq-devel",
      "release": "RHEL 8",
      "fixedVersion": "0:1.6-12.el8_10",
      "fix": "RHSA-2026:16252",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-16252",
      "released": "2026-05-15T16:01:54Z"
    },
    {
      "platform": "linux",
      "product": "jq-devel",
      "release": "RHEL 9",
      "fixedVersion": "0:1.6-19.el9_8.2",
      "fix": "RHSA-2026:19365",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-19365",
      "released": "2026-05-15T16:04:04Z"
    },
    {
      "platform": "linux",
      "product": "jq-devel",
      "release": "almalinux 10",
      "fixedVersion": "1.7.1-11.el10_2.2",
      "fix": "ALSA-2026:19151",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-19151",
      "released": "2026-05-19T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "jq-devel",
      "release": "almalinux 8",
      "fixedVersion": "1.6-12.el8_10",
      "fix": "ALSA-2026:16252",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-16252",
      "released": "2026-05-12T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "jq-devel",
      "release": "almalinux 9",
      "fixedVersion": "1.6-19.el9_8.2",
      "fix": "ALSA-2026:19365",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-19365",
      "released": "2026-05-19T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "jq-devel",
      "release": "amzn 2023",
      "fixedVersion": "1.8.1-59.amzn2023",
      "fix": "ALAS2023-2026-1815",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1815",
      "released": "2026-06-08T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "jq-devel",
      "release": "ol 10",
      "fixedVersion": "0:1.7.1-11.el10_1.0.2",
      "fix": "ELSA-2026-16692",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-16692",
      "released": "2026-05-13T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "jq-devel",
      "release": "ol 8",
      "fixedVersion": "0:1.6-12.el8_10",
      "fix": "ELSA-2026-16252",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-16252",
      "released": "2026-05-13T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "jq-devel",
      "release": "ol 9",
      "fixedVersion": "0:1.6-19.el9_7.0.2",
      "fix": "ELSA-2026-16693",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-16693",
      "released": "2026-05-13T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libjq1",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1.5\u002Bdfsg-2ubuntu0.1~esm3",
      "fix": "libjq1 1.5\u002Bdfsg-2ubuntu0.1~esm3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libjq1-1.5-dfsg-2ubuntu0.1-esm3",
      "released": "2026-04-13T17:16:00Z"
    },
    {
      "platform": "linux",
      "product": "libjq1",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "1.6-1ubuntu0.20.04.1\u002Besm2",
      "fix": "libjq1 1.6-1ubuntu0.20.04.1\u002Besm2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libjq1-1.6-1ubuntu0.20.04.1-esm2",
      "released": "2026-04-13T17:16:00Z"
    },
    {
      "platform": "linux",
      "product": "libjq1",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1.6-2.1ubuntu3.2",
      "fix": "libjq1 1.6-2.1ubuntu3.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-libjq1-1.6-2.1ubuntu3.2",
      "released": "2026-04-13T17:16:00Z"
    },
    {
      "platform": "linux",
      "product": "libjq1",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "1.7.1-3ubuntu0.24.04.2",
      "fix": "libjq1 1.7.1-3ubuntu0.24.04.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-libjq1-1.7.1-3ubuntu0.24.04.2",
      "released": "2026-04-13T17:16:00Z"
    },
    {
      "platform": "linux",
      "product": "libjq1",
      "release": "Ubuntu 25.10 (questing)",
      "fixedVersion": "1.8.1-3ubuntu1.1",
      "fix": "libjq1 1.8.1-3ubuntu1.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-questing-libjq1-1.8.1-3ubuntu1.1",
      "released": "2026-04-13T17:16:00Z"
    },
    {
      "platform": "linux",
      "product": "libjq1",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "1.8.1-4ubuntu2",
      "fix": "libjq1 1.8.1-4ubuntu2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-libjq1-1.8.1-4ubuntu2",
      "released": "2026-04-13T17:16:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}