{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "13.0.0"
              },
              {
                "fixed": "13.4.31"
              },
              {
                "introduced": "14.0.0"
              },
              {
                "fixed": "14.3.3"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "fd8745e46bb11773e85524b8ee9650dabe340713"
            },
            {
              "introduced": "6d6bd23afff6a48ee3efeaa68eb829820397d6a1"
            },
            {
              "fixed": "59bfeaaf0136dfe17011786ce825884e48bedc8d"
            },
            {
              "fixed": "e16ec78165a7d60f09dcac04bfbb309409e174b3"
            },
            {
              "fixed": "48bcf24f31f52cc0b43d3bea4984634bd2cf85c7"
            },
            {
              "fixed": "87cd7c5b710c44d3606fed277b040a75dc6a9c02"
            }
          ],
          "repo": "https://github.com/typo3/typo3",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "TYPO3",
    "cwe_ids": [
      "CWE-502"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49740.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "fixed": "10.4.57"
          },
          {
            "introduced": "11.0.0"
          },
          {
            "fixed": "11.5.51"
          },
          {
            "introduced": "12.0.0"
          },
          {
            "fixed": "12.4.46"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "details": "TYPO3's cache frontend (VariableFrontend) and persistent key-value store (Registry) deserialized PHP payloads without integrity validation or class restrictions. An attacker with write access to the underlying storage backend (cache store or sys_registry database table) could inject a crafted serialized payload to trigger PHP Object Injection, potentially exploiting a gadget chain to achieve Remote Code Execution or other high-impact effects. Exploiting this vulnerability requires direct local write access to the storage, such as the SQL database or file system. This issue affects TYPO3 CMS versions before 10.4.57, 11.0.0-11.5.51, 12.0.0-12.4.46, 13.0.0-13.4.31 and 14.0.0-14.3.3.",
  "id": "CVE-2026-49740",
  "modified": "2026-07-08T05:36:55.487093704Z",
  "published": "2026-06-09T10:53:55.777Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://packagist.org"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49740.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-49740"
    },
    {
      "type": "ADVISORY",
      "url": "https://typo3.org/security/advisory/typo3-core-sa-2026-018"
    },
    {
      "type": "FIX",
      "url": "https://github.com/TYPO3/typo3/commit/48bcf24f31f52cc0b43d3bea4984634bd2cf85c7"
    },
    {
      "type": "FIX",
      "url": "https://github.com/TYPO3/typo3/commit/87cd7c5b710c44d3606fed277b040a75dc6a9c02"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/TYPO3/typo3"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:H/SI:H/SA:H",
      "type": "CVSS_V4"
    }
  ],
  "summary": "TYPO3 CMS - Insecure Deserialization in Core API"
}