{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "7.8.0"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "68876715350c6c8f49c324e5515e64908830aed7"
            },
            {
              "fixed": "a366291cfcd29ec140911c97ee8e0e794f2a40f9"
            }
          ],
          "repo": "https://github.com/thumbor/thumbor",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-6x26-6r6f-m537"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-918"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53500.json"
  },
  "details": "Thumbor is an open-source photo thumbnail service by globo.com. Prior to 7.8.0, the ALLOWED_SOURCES configuration passes plain strings to re.match() without escaping dots, so a hostname differing at dot positions can match the allowlist. This issue is fixed in 7.8.0.",
  "id": "CVE-2026-53500",
  "modified": "2026-08-02T03:32:16.389845366Z",
  "published": "2026-07-31T18:35:54.234Z",
  "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-2026-53500.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/thumbor/thumbor/security/advisories/GHSA-6x26-6r6f-m537"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53500"
    },
    {
      "type": "FIX",
      "url": "https://github.com/thumbor/thumbor/commit/68876715350c6c8f49c324e5515e64908830aed7"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Thumbor treats ALLOWED_SOURCES string patterns as unescaped regex, allowing hostname bypass via wildcard dot"
}