{
  "cveId": "CVE-2026-39956",
  "url": "https://patchblox.com/security/cve/CVE-2026-39956",
  "summary": "CVE-2026-39956 is fixed in 5 products on 1 platform, first by jq 1.5\u002Bdfsg-2ubuntu0.1~esm2, released April 13, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "jq: Missing runtime type checks for _strindices lead to crash and limited memory disclosure",
  "description": "jq is a command-line JSON processor. Prior to version 1.8.2, the _strindices builtin in jq\u0027s src/builtin.c passes its arguments directly to jv_string_indexes() without verifying they are strings, and jv_string_indexes() in src/jv.c relies solely on assert() checks that are stripped in release builds compiled with -DNDEBUG. This allows an attacker to crash jq trivially with input like _strindices(0), and by crafting a numeric value whose IEEE-754 bit pattern maps to a chosen pointer, achieve a controlled pointer dereference and limited memory read/probe primitive. Any deployment that evaluates untrusted jq filters against a release build is vulnerable. This issue has been patched in commit fdf8ef0f0810e3d365cdd5160de43db46f57ed03, which is part of version 1.8.2.",
  "published": "2026-04-13T16:16:00Z",
  "severity": "Moderate",
  "cvss": 6.1,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H",
  "cwe": "Out-of-bounds Read",
  "epss": 0.00174,
  "epssPercentile": 0.0691,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-39956",
  "fixes": [
    {
      "platform": "linux",
      "product": "jq",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "1.6-2.1\u002Bdeb12u2",
      "fix": "DEBIAN-CVE-2026-39956",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-39956",
      "released": "2026-04-13T23:16:27Z"
    },
    {
      "platform": "linux",
      "product": "jq",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "1.7.1-6\u002Bdeb13u2",
      "fix": "DEBIAN-CVE-2026-39956",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-39956",
      "released": "2026-04-13T23:16:27Z"
    },
    {
      "platform": "linux",
      "product": "jq",
      "release": "Debian 14",
      "fixedVersion": "1.8.1-5",
      "fix": "DEBIAN-CVE-2026-39956",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-39956",
      "released": "2026-04-13T23:16:27Z"
    },
    {
      "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": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1.5\u002Bdfsg-2ubuntu0.1~esm2",
      "fix": "jq 1.5\u002Bdfsg-2ubuntu0.1~esm2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-jq-1.5-dfsg-2ubuntu0.1-esm2",
      "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": "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": "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": "sles 15.7",
      "fixedVersion": "1.6-150000.3.20.1",
      "fix": "SUSE-SU-2026:2983-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-2983-1",
      "released": "2026-07-14T13:19:54Z"
    },
    {
      "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",
      "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-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": "libjq1",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1.5\u002Bdfsg-2ubuntu0.1~esm2",
      "fix": "libjq1 1.5\u002Bdfsg-2ubuntu0.1~esm2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libjq1-1.5-dfsg-2ubuntu0.1-esm2",
      "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": "2026-11-09T07:25:28Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}