{
  "cveId": "CVE-2026-73639",
  "url": "https://patchblox.com/security/cve/CVE-2026-73639",
  "summary": "CVE-2026-73639 is fixed in libimager-perl on 1 platform by DEBIAN-CVE-2026-73639 (version 1.035\u002Bdfsg-1), released August 25, 2026. It is not reported as exploited. Patch Radar priority: Urgent.",
  "title": "libimager-perl: Imager::File::PNG versions from 1.003 before 1.004 for Perl write past the end of the row buffer reading a PNG with a...",
  "description": "Imager::File::PNG versions from 1.003 before 1.004 for Perl write past the end of the row buffer reading a PNG with a tRNS transparency chunk in read_direct8.  With a tRNS chunk, read_direct8() adds an alpha channel to the image it creates but still sizes the row buffer from the original channel count. libpng expands the transparency into that extra channel, so png_read_row() fills one channel more than the buffer holds, at one byte per sample, and writes width bytes past the end of the allocation. Palette images go to read_paletted() and 16-bit images to read_direct16(), which sizes its buffer from png_get_rowbytes() and allocates enough for the expanded row.  The same reader ships bundled in the Imager distribution.  Reading an attacker-supplied PNG through Imager-\u003Eread() corrupts the heap, which can crash the process.",
  "published": "2026-09-17T22:17:03Z",
  "severity": "critical",
  "cvss": 9.1,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
  "epss": 0.00702,
  "epssPercentile": 0.53486,
  "priority": "Urgent",
  "priorityTier": 2,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "libimager-perl",
      "release": "Debian 14",
      "fixedVersion": "1.035\u002Bdfsg-1",
      "fix": "DEBIAN-CVE-2026-73639",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-73639",
      "released": "2026-08-25T00:08:54Z"
    }
  ],
  "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"
  }
}