{"id":"CVE-2026-108358","published":"2026-10-22T18:17:26.553","lastModified":"2026-10-23T22:16:53.307","description":"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.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":["CWE-611","CWE-776"],"vendors":[],"products":[],"references":[{"url":"https://github.com/PHPOffice/PhpSpreadsheet/commit/299993894dce37aa3b64aa23e9a3f4bb77ab0e66","tags":[]},{"url":"https://github.com/PHPOffice/PhpSpreadsheet/commit/89f455c133e1a7e2d4abfadc43ce29eb7450d781","tags":[]},{"url":"https://github.com/PHPOffice/PhpSpreadsheet/commit/980b5c294493856f1a25754f1e8a1d2185b93738","tags":[]},{"url":"https://github.com/PHPOffice/PhpSpreadsheet/commit/9a0b48622ebfe93fa48cb9bc09ce57303bb07af9","tags":[]},{"url":"https://github.com/PHPOffice/PhpSpreadsheet/commit/da13f40e8760d599b0e8a296017d4b028b20e86c","tags":[]},{"url":"https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/1.30.7","tags":[]},{"url":"https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/2.1.19","tags":[]},{"url":"https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/2.4.8","tags":[]},{"url":"https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/3.10.8","tags":[]},{"url":"https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/5.10.0","tags":[]},{"url":"https://github.com/PHPOffice/PhpSpreadsheet/security/advisories/GHSA-3x94-m842-937c","tags":[]}],"exploitRefs":[{"url":"https://github.com/PHPOffice/PhpSpreadsheet/commit/299993894dce37aa3b64aa23e9a3f4bb77ab0e66","tags":[]},{"url":"https://github.com/PHPOffice/PhpSpreadsheet/commit/89f455c133e1a7e2d4abfadc43ce29eb7450d781","tags":[]},{"url":"https://github.com/PHPOffice/PhpSpreadsheet/commit/980b5c294493856f1a25754f1e8a1d2185b93738","tags":[]},{"url":"https://github.com/PHPOffice/PhpSpreadsheet/commit/9a0b48622ebfe93fa48cb9bc09ce57303bb07af9","tags":[]},{"url":"https://github.com/PHPOffice/PhpSpreadsheet/commit/da13f40e8760d599b0e8a296017d4b028b20e86c","tags":[]},{"url":"https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/1.30.7","tags":[]},{"url":"https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/2.1.19","tags":[]},{"url":"https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/2.4.8","tags":[]},{"url":"https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/3.10.8","tags":[]},{"url":"https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/5.10.0","tags":[]},{"url":"https://github.com/PHPOffice/PhpSpreadsheet/security/advisories/GHSA-3x94-m842-937c","tags":[]}],"hasPoc":true,"ai":null}