{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "7.8.0"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2c716119de986cfc68c7071af52a98187e006023"
            },
            {
              "fixed": "a366291cfcd29ec140911c97ee8e0e794f2a40f9"
            }
          ],
          "repo": "https://github.com/thumbor/thumbor",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-phj3-59pf-cp83"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-400"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53505.json"
  },
  "details": "Thumbor is an open-source photo thumbnail service by globo.com. Prior to 7.8.0, Thumbor's filters:proportion(\u003cvalue\u003e) filter does not enforce an upper bound on \u003cvalue\u003e and runs in the post-transform phase. An attacker can trigger extremely large resizes (CPU/memory exhaustion) and cause denial of service. This issue is fixed in 7.8.0.",
  "id": "CVE-2026-53505",
  "modified": "2026-08-02T03:32:00.760732625Z",
  "published": "2026-07-31T19:00:22.755Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/thumbor/thumbor/releases/tag/7.8.0"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53505.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/thumbor/thumbor/security/advisories/GHSA-phj3-59pf-cp83"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53505"
    },
    {
      "type": "FIX",
      "url": "https://github.com/thumbor/thumbor/commit/2c716119de986cfc68c7071af52a98187e006023"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Thumbor proportion filter allows unbounded post-transform resize leading to remote DoS"
}