{
  "cveId": "CVE-2026-5089",
  "url": "https://patchblox.com/security/cve/CVE-2026-5089",
  "summary": "CVE-2026-5089 is fixed in 5 products on 1 platform, first by ALAS2023-2026-1769, released May 25, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "libyaml-syck-perl: YAML::Syck versions before 1.38 for Perl  has an out-of-bounds read",
  "description": "YAML::Syck versions before 1.38 for Perl  has an out-of-bounds read.  The base60 (sexagesimal) parsing code in perl_syck.h has a buffer underflow bug in both int#base60 and float#base60 handlers. When processing the leftmost segment of a colon-separated value (e.g., the 1 in 1:30:45), the inner while loop can decrement a pointer past the start of the string buffer:      while ( colon \u003E= ptr \u0026\u0026 *colon != \u0027:\u0027 )     {         colon--;     }     if ( *colon == \u0027:\u0027 ) *colon = \u0027\\0\u0027;  // colon may be ptr-1 here  When no colon is found (final/leftmost segment), colon becomes ptr-1, and the subsequent *colon dereference reads one byte before the allocated buffer.",
  "published": "2026-05-12T17:16:21Z",
  "severity": "high",
  "cvss": 7.3,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
  "epss": 0.00404,
  "epssPercentile": 0.34856,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "libyaml-syck-perl",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "1.34-2\u002Bdeb12u3",
      "fix": "DEBIAN-CVE-2026-5089",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-5089",
      "released": "2026-05-27T17:38:13Z"
    },
    {
      "platform": "linux",
      "product": "libyaml-syck-perl",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "1.34-2\u002Bdeb13u3",
      "fix": "DEBIAN-CVE-2026-5089",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-5089",
      "released": "2026-05-27T17:38:13Z"
    },
    {
      "platform": "linux",
      "product": "libyaml-syck-perl",
      "release": "Debian 14",
      "fixedVersion": "1.36-3",
      "fix": "DEBIAN-CVE-2026-5089",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-5089",
      "released": "2026-05-27T17:38:13Z"
    },
    {
      "platform": "linux",
      "product": "perl-YAML-Syck",
      "release": "amzn 2023",
      "fixedVersion": "1.37-1.amzn2023.0.3",
      "fix": "ALAS2023-2026-1769",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1769",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "perl-YAML-Syck",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "1.450.0-bp160.2.1",
      "fix": "OPENSUSE-SU-2026:20938-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-20938-1",
      "released": "2026-06-10T11:47:47Z"
    },
    {
      "platform": "linux",
      "product": "perl-YAML-Syck-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1.37-1.amzn2023.0.3",
      "fix": "ALAS2023-2026-1769",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1769",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "perl-YAML-Syck-debugsource",
      "release": "amzn 2023",
      "fixedVersion": "1.37-1.amzn2023.0.3",
      "fix": "ALAS2023-2026-1769",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1769",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "perl-YAML-Syck-tests",
      "release": "amzn 2023",
      "fixedVersion": "1.37-1.amzn2023.0.3",
      "fix": "ALAS2023-2026-1769",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1769",
      "released": "2026-05-25T09:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}