{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
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                "range": [
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                    "introduced": "0"
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                "source": "AFFECTED_FIELD",
                "strategy": "StringRangeExpression"
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                "range": [
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                    "introduced": "2.0.0"
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                "source": "AFFECTED_FIELD",
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              {
                "range": [
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                    "introduced": "2.2.0"
                  },
                  {
                    "fixed": "2.4.8"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StringRangeExpression"
              },
              {
                "range": [
                  {
                    "introduced": "3.3.0"
                  },
                  {
                    "fixed": "3.10.8"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StringRangeExpression"
              },
              {
                "range": [
                  {
                    "introduced": "4.0.0"
                  },
                  {
                    "fixed": "5.10.0"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StringRangeExpression"
              },
              {
                "range": [
                  {
                    "fixed": "299993894dce37aa3b64aa23e9a3f4bb77ab0e66"
                  }
                ],
                "source": "REFERENCES_COMMIT"
              },
              {
                "range": [
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                    "fixed": "89f455c133e1a7e2d4abfadc43ce29eb7450d781"
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                "source": "REFERENCES_COMMIT"
              },
              {
                "range": [
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                    "fixed": "980b5c294493856f1a25754f1e8a1d2185b93738"
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                "source": "REFERENCES_COMMIT"
              },
              {
                "range": [
                  {
                    "fixed": "9a0b48622ebfe93fa48cb9bc09ce57303bb07af9"
                  }
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                "source": "REFERENCES_COMMIT"
              },
              {
                "range": [
                  {
                    "fixed": "da13f40e8760d599b0e8a296017d4b028b20e86c"
                  }
                ],
                "source": "REFERENCES_COMMIT"
              },
              {
                "original_tag": "1.30.7",
                "range": [
                  {
                    "fixed": "f5dd9c1f084d336ea63cf53099533e061a9c157a"
                  }
                ],
                "source": "REFERENCES_TAG"
              },
              {
                "original_tag": "2.1.19",
                "range": [
                  {
                    "fixed": "eb2ad61ccffa21bdc77481c69403f2bed5b13e5b"
                  }
                ],
                "source": "REFERENCES_TAG"
              },
              {
                "original_tag": "2.4.8",
                "range": [
                  {
                    "fixed": "badf4f22c54332046af37687c3384c6a0ed14ae1"
                  }
                ],
                "source": "REFERENCES_TAG"
              },
              {
                "original_tag": "3.10.8",
                "range": [
                  {
                    "fixed": "fee9c1ca8d9f1f676f007ac1ab134ce43624bd52"
                  }
                ],
                "source": "REFERENCES_TAG"
              },
              {
                "original_tag": "5.10.0",
                "range": [
                  {
                    "fixed": "eb18727acf6b1f4cc67145a52ab04f9fd4c28d53"
                  }
                ],
                "source": "REFERENCES_TAG"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "f5dd9c1f084d336ea63cf53099533e061a9c157a"
            },
            {
              "introduced": "4a77798f835119754961a97714f135826a323caa"
            },
            {
              "fixed": "eb2ad61ccffa21bdc77481c69403f2bed5b13e5b"
            },
            {
              "introduced": "b0993b7e4d9c860133365d115b176bc6e0f57022"
            },
            {
              "fixed": "badf4f22c54332046af37687c3384c6a0ed14ae1"
            },
            {
              "introduced": "87ddd21eb0b6b7ad20a11d314348ef307475f547"
            },
            {
              "fixed": "fee9c1ca8d9f1f676f007ac1ab134ce43624bd52"
            },
            {
              "introduced": "2d4b9f3582102aafb6b1378fff8a20eeeacfb31c"
            },
            {
              "fixed": "eb18727acf6b1f4cc67145a52ab04f9fd4c28d53"
            },
            {
              "fixed": "299993894dce37aa3b64aa23e9a3f4bb77ab0e66"
            },
            {
              "fixed": "89f455c133e1a7e2d4abfadc43ce29eb7450d781"
            },
            {
              "fixed": "980b5c294493856f1a25754f1e8a1d2185b93738"
            },
            {
              "fixed": "9a0b48622ebfe93fa48cb9bc09ce57303bb07af9"
            },
            {
              "fixed": "da13f40e8760d599b0e8a296017d4b028b20e86c"
            }
          ],
          "repo": "https://github.com/phpoffice/phpspreadsheet",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-3x94-m842-937c"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-611",
      "CWE-776"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/108xxx/CVE-2026-108358.json"
  },
  "details": "PhpSpreadsheet is a pure PHP library for reading and writing spreadsheet files. Prior to 1.30.7, 2.1.19, 2.4.8, 3.10.8, and 5.10.0, XmlScanner::scan in src/PhpSpreadsheet/Reader/Security/XmlScanner.php uses a DOCTYPE detection pattern that accounts for NUL-byte interleaving but not ISO-2022 escape sequences in XLSX XML parts. The escape sequences prevent the scanner from matching the declaration, and XML charset normalization then removes the escape bytes before parsing, exposing a valid DOCTYPE and entity definitions. Processing an attacker-controlled XLSX can therefore cause entity-expansion denial of service on supported PHP versions and can permit local file access or SSRF on PHP before 8.0 or when LIBXML_NOENT is enabled. This issue is fixed in versions 1.30.7, 2.1.19, 2.4.8, 3.10.8, and 5.10.0.",
  "id": "CVE-2026-108358",
  "modified": "2026-10-23T02:30:32.840632394Z",
  "published": "2026-10-22T17:29:56.449Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/108xxx/CVE-2026-108358.json"
    },
    {
      "type": "FIX",
      "url": "https://github.com/PHPOffice/PhpSpreadsheet/commit/299993894dce37aa3b64aa23e9a3f4bb77ab0e66"
    },
    {
      "type": "FIX",
      "url": "https://github.com/PHPOffice/PhpSpreadsheet/commit/89f455c133e1a7e2d4abfadc43ce29eb7450d781"
    },
    {
      "type": "FIX",
      "url": "https://github.com/PHPOffice/PhpSpreadsheet/commit/980b5c294493856f1a25754f1e8a1d2185b93738"
    },
    {
      "type": "FIX",
      "url": "https://github.com/PHPOffice/PhpSpreadsheet/commit/9a0b48622ebfe93fa48cb9bc09ce57303bb07af9"
    },
    {
      "type": "FIX",
      "url": "https://github.com/PHPOffice/PhpSpreadsheet/commit/da13f40e8760d599b0e8a296017d4b028b20e86c"
    },
    {
      "type": "WEB",
      "url": "https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/1.30.7"
    },
    {
      "type": "WEB",
      "url": "https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/2.1.19"
    },
    {
      "type": "WEB",
      "url": "https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/2.4.8"
    },
    {
      "type": "WEB",
      "url": "https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/3.10.8"
    },
    {
      "type": "WEB",
      "url": "https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/5.10.0"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/PHPOffice/PhpSpreadsheet/security/advisories/GHSA-3x94-m842-937c"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-108358"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:L/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "PhpSpreadsheet: XmlScanner Bypass via ISO-2022 Escape Sequences Allows XXE and Denial of Service"
}