{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "3.1.6"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7c65e7bbeccf146b2409740405af73949ad129d0"
            },
            {
              "fixed": "6d4b4eb8500f7a786da8868ba463a71b725a4005"
            }
          ],
          "repo": "https://github.com/dompdf/dompdf",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-8hg6-c449-896m"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-400"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/59xxx/CVE-2026-59941.json"
  },
  "details": "Dompdf is an HTML to PDF converter for PHP. Versions 3.15 and prior accept a BMP image and generates a PDF-compatible PNG based only on its declared header dimensions and never bounds width × height before the image is converted through GD. A 58-byte BMP whose header declares e.g. 6000×6000 is accepted and later drives imagecreatetruecolor($width, $height) (and PHP's native BMP decoder) to allocate the full pixel canvas. A payload can fit in a single HTTP request: the BMP can be inlined as a data:image/bmp;base64,… URI inside attacker-controlled HTML, so no upload, no remote fetch, and no chroot-reachable file is required. I measured a 169-byte request driving a dompdf render to ~412 MB peak RSS and ~4.8 s of CPU/wall time, versus ~34 MB for an identically-sized benign request — roughly a 12× memory amplification per request, repeatable and unauthenticated. This issue has been fixed in version 3.16.",
  "id": "CVE-2026-59941",
  "modified": "2026-07-31T03:33:43.961079402Z",
  "published": "2026-07-28T20:42:57.010Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/dompdf/dompdf/releases/tag/v3.1.6"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/59xxx/CVE-2026-59941.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/dompdf/dompdf/security/advisories/GHSA-8hg6-c449-896m"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-59941"
    },
    {
      "type": "FIX",
      "url": "https://github.com/dompdf/dompdf/commit/7c65e7bbeccf146b2409740405af73949ad129d0"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Dompdf: Uncontrolled resource consumption based on declared BMP dimensions"
}