{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "2.0.0-beta.1"
              },
              {
                "fixed": "2.0.0-rc.8"
              },
              {
                "introduced": "0"
              },
              {
                "fixed": "1.7.53"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "26a2d519c59c620e2b0a54d0baf33889d7d5db0a"
            },
            {
              "introduced": "0"
            },
            {
              "fixed": "1b8758c867f4e15d532946a09f0f766f367f28c0"
            },
            {
              "fixed": "d10262fd47ee9ad4f067c8ea1f25b0980ddbd205"
            },
            {
              "fixed": "d9f9f0369a07ae5c96cde700c7949e1237b29cf6"
            },
            {
              "fixed": "f4c0f42eea755cedad6f626b342c88d4cba72174"
            }
          ],
          "repo": "https://github.com/getgrav/grav",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-4x9g-vw65-vvf9"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-770"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53653.json"
  },
  "details": "Grav is a file-based Web platform. Prior to 1.7.53 and 2.0.0-rc.8, Grav allows an unauthenticated visitor to exhaust server memory and CPU by requesting image derivatives with oversized dimensions through URL query image actions such as forceResize in Grav::fallbackUrl, which passes request parameters to ImageMedium magic actions without a dimension or pixel ceiling. This issue is fixed in versions 1.7.53 and 2.0.0-rc.8.",
  "id": "CVE-2026-53653",
  "modified": "2026-07-15T01:49:22.278945175Z",
  "published": "2026-07-10T16:12:01.576Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/getgrav/grav/releases/tag/1.7.53"
    },
    {
      "type": "WEB",
      "url": "https://github.com/getgrav/grav/releases/tag/2.0.0-rc.8"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53653.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/getgrav/grav/security/advisories/GHSA-4x9g-vw65-vvf9"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53653"
    },
    {
      "type": "FIX",
      "url": "https://github.com/getgrav/grav/commit/d9f9f0369a07ae5c96cde700c7949e1237b29cf6"
    },
    {
      "type": "FIX",
      "url": "https://github.com/getgrav/grav/commit/f4c0f42eea755cedad6f626b342c88d4cba72174"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Grav: Unauthenticated denial of service via unbounded image derivative dimensions"
}