{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:apache:fory:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "0.13.0"
              },
              {
                "fixed": "1.0.0"
              }
            ],
            "source": "CPE_RANGE"
          },
          "events": [
            {
              "introduced": "471a646d2d3c3aad32870c76e986dc19b51de6d4"
            },
            {
              "fixed": "36a01b6253d5974f13be3258205ac13f0ceaee44"
            }
          ],
          "repo": "https://github.com/apache/fory",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "apache",
    "cwe_ids": [
      "CWE-502"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48207.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "introduced": "0.13.0"
          },
          {
            "fixed": "1.0.0"
          }
        ],
        "source": "AFFECTED_FIELD"
      },
      {
        "extracted_events": [
          {
            "fixed": "1.0.0"
          }
        ],
        "source": "DESCRIPTION"
      }
    ]
  },
  "details": "Deserialization of untrusted data in Apache Fory PyFory. PyFory's ReduceSerializer could bypass documented DeserializationPolicy validation hooks during reduce-state restoration and global-name resolution. An application is vulnerable if it deserializes attacker-controlled data using PyFory Python-native mode with strict mode disabled and relies on DeserializationPolicy to restrict unsafe classes, functions, or module attributes.\n\nThis issue affects Apache Fory: from before 1.0.0.\n\nMitigation: Users of Apache Fory are recommended to upgrade to version 1.0.0 or later, which enforces DeserializationPolicy validation for the affected ReduceSerializer paths and thus fixes this issue.",
  "id": "CVE-2026-48207",
  "modified": "2026-07-15T01:49:20.903282937Z",
  "published": "2026-05-21T15:51:12.292Z",
  "references": [
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2026/05/21/10"
    },
    {
      "type": "WEB",
      "url": "https://pypi.org/"
    },
    {
      "type": "ADVISORY",
      "url": "https://fory.apache.org/security/#cve-2026-48207-pyfory-reduceserializer-deserializationpolicy-bypass"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48207.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-48207"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Apache Fory: PyFory ReduceSerializer Incomplete Policy Enforcement"
}