{
  "cveId": "CVE-2026-4177",
  "url": "https://patchblox.com/security/cve/CVE-2026-4177",
  "summary": "CVE-2026-4177 is fixed in 5 products on 1 platform, first by DEBIAN-CVE-2026-4177, released March 16, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "perl-YAML-Syck: This module provides a Perl interface to the libsyck data serialization library",
  "description": "This module provides a Perl interface to the libsyck data serialization library. It exports the Dump and Load functions for converting Perl data structures to YAML strings, and the other way around.\n\nSecurity Fix(es):\n\n* perl-YAML-Syck: YAML::Syck versions through 1.36 for Perl has several potential security vulnerabilities including a high-severity heap buffer overflow in the YAML emitter (CVE-2026-4177)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.",
  "published": "2026-03-16T23:16:21Z",
  "severity": "Important",
  "cvss": 9.1,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
  "epss": 0.00455,
  "epssPercentile": 0.39735,
  "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\u002Bdeb12u2",
      "fix": "DSA-6175-1",
      "url": "https://patchblox.com/security/fix/linux/dsa-6175-1",
      "released": "2026-03-22T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libyaml-syck-perl",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "1.34-2\u002Bdeb13u2",
      "fix": "DSA-6175-1",
      "url": "https://patchblox.com/security/fix/linux/dsa-6175-1",
      "released": "2026-03-22T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libyaml-syck-perl",
      "release": "Debian 14",
      "fixedVersion": "1.36-2",
      "fix": "DEBIAN-CVE-2026-4177",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-4177",
      "released": "2026-03-16T23:16:21Z"
    },
    {
      "platform": "linux",
      "product": "perl-YAML-Syck",
      "release": "RHEL 8",
      "fixedVersion": "0:1.30-6.el8_10",
      "fix": "RHSA-2026:6470",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-6470",
      "released": "2026-04-15T19:03:41Z"
    },
    {
      "platform": "linux",
      "product": "perl-YAML-Syck",
      "release": "almalinux 8",
      "fixedVersion": "1.30-6.el8_10",
      "fix": "ALSA-2026:6470",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-6470",
      "released": "2026-04-02T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "perl-YAML-Syck",
      "release": "amzn 2023",
      "fixedVersion": "1.37-1.amzn2023.0.1",
      "fix": "ALAS2023-2026-1517",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1517",
      "released": "2026-03-30T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "perl-YAML-Syck",
      "release": "ol 8",
      "fixedVersion": "0:1.30-6.el8_10",
      "fix": "ELSA-2026-6470",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-6470",
      "released": "2026-04-03T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "perl-YAML-Syck",
      "release": "rocky 8",
      "fixedVersion": "0:1.30-6.el8_10",
      "fix": "RLSA-2026:6470",
      "url": "https://patchblox.com/security/fix/linux/rlsa-2026-6470",
      "released": "2026-04-09T06:02:33Z"
    },
    {
      "platform": "linux",
      "product": "perl-YAML-Syck-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1.37-1.amzn2023.0.1",
      "fix": "ALAS2023-2026-1517",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1517",
      "released": "2026-03-30T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "perl-YAML-Syck-debugsource",
      "release": "amzn 2023",
      "fixedVersion": "1.37-1.amzn2023.0.1",
      "fix": "ALAS2023-2026-1517",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1517",
      "released": "2026-03-30T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "perl-YAML-Syck-tests",
      "release": "amzn 2023",
      "fixedVersion": "1.37-1.amzn2023.0.1",
      "fix": "ALAS2023-2026-1517",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1517",
      "released": "2026-03-30T09:00:00Z"
    }
  ],
  "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"
  }
}