{
  "cveId": "CVE-2026-8463",
  "url": "https://patchblox.com/security/cve/CVE-2026-8463",
  "summary": "CVE-2026-8463 is fixed in libcrypt-argon2-perl on 1 platform by DEBIAN-CVE-2026-8463 (version 0.031-1), released May 27, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "libcrypt-argon2-perl: Crypt::Argon2 versions from 0.017 before 0.031 for Perl perform a heap out-of-bounds read in argon2_verify on empty e...",
  "description": "Crypt::Argon2 versions from 0.017 before 0.031 for Perl perform a heap out-of-bounds read in argon2_verify on empty encoded input.  The auto-detect form of argon2_verify passes encoded_len - 1 as the length argument to memchr without checking that encoded_len is non-zero. When the encoded string is empty, the size_t subtraction underflows to SIZE_MAX and memchr scans adjacent heap memory looking for a \u0027$\u0027 separator byte.  A caller that invokes argon2_verify against a stored hash that may legitimately be empty (for example a placeholder row or a NULL column materialised as an empty string) reads out-of-bounds heap memory, which can crash the process or leak the position of an adjacent \u0027$\u0027 byte into subsequent parsing.",
  "published": "2026-05-13T14:18:17Z",
  "severity": "medium",
  "cvss": 5.3,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
  "epss": 0.00327,
  "epssPercentile": 0.2593,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "libcrypt-argon2-perl",
      "release": "Debian 14",
      "fixedVersion": "0.031-1",
      "fix": "DEBIAN-CVE-2026-8463",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-8463",
      "released": "2026-05-27T17:38:13Z"
    }
  ],
  "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"
  }
}