{
  "cveId": "CVE-2026-9516",
  "url": "https://patchblox.com/security/cve/CVE-2026-9516",
  "summary": "CVE-2026-9516 is fixed in 4 products on 1 platform, first by ALAS2023-2026-1829, released June 11, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "libcpanel-json-xs-perl: Cpanel::JSON::XS versions before 4.41 for Perl allow denial of service via UTF-8 BOM prefixed input when a decode fil...",
  "description": "Cpanel::JSON::XS versions before 4.41 for Perl allow denial of service via UTF-8 BOM prefixed input when a decode filter callback throws.  To skip a leading 3-byte UTF-8 BOM, decode_json() advances the input scalar\u0027s string pointer past the mark with SvPV_set() and restores it only on the normal return path. When decoding aborts through a Perl exception, for example a filter_json_object callback that croaks, the restore is skipped and the scalar is left with its string pointer offset into its own buffer and a shortened length.  When that scalar is later freed, the allocator receives an invalid pointer and the interpreter aborts. A single BOM prefixed document decoded with a throwing filter callback crashes any caller.",
  "published": "2026-06-03T01:16:23Z",
  "severity": "high",
  "cvss": 7.5,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00361,
  "epssPercentile": 0.30038,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "libcpanel-json-xs-perl",
      "release": "Debian 14",
      "fixedVersion": "4.41-1",
      "fix": "DEBIAN-CVE-2026-9516",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-9516",
      "released": "2026-06-24T14:07:24Z"
    },
    {
      "platform": "linux",
      "product": "perl-Cpanel-JSON-XS",
      "release": "amzn 2023",
      "fixedVersion": "4.25-2.amzn2023.0.9",
      "fix": "ALAS2023-2026-1829",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1829",
      "released": "2026-06-11T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "perl-Cpanel-JSON-XS",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "4.420.0-bp160.1.1",
      "fix": "OPENSUSE-SU-2026:21140-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-21140-1",
      "released": "2026-06-19T09:45:15Z"
    },
    {
      "platform": "linux",
      "product": "perl-Cpanel-JSON-XS",
      "release": "sles 15.7",
      "fixedVersion": "4.800.0-150700.3.9.1",
      "fix": "SUSE-SU-2026:4926-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-4926-1",
      "released": "2026-11-07T00:43:02Z"
    },
    {
      "platform": "linux",
      "product": "perl-Cpanel-JSON-XS-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "4.25-2.amzn2023.0.9",
      "fix": "ALAS2023-2026-1829",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1829",
      "released": "2026-06-11T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "perl-Cpanel-JSON-XS-debugsource",
      "release": "amzn 2023",
      "fixedVersion": "4.25-2.amzn2023.0.9",
      "fix": "ALAS2023-2026-1829",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1829",
      "released": "2026-06-11T09:00:00Z"
    }
  ],
  "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"
  }
}