{"id":"CVE-2026-108357","published":"2026-10-22T18:17:26.377","lastModified":"2026-10-23T22:16:53.180","description":"PhpSpreadsheet is a pure PHP library for reading and writing spreadsheet files. From 3.3.0 until 3.10.8 and 5.10.0, Reader\\Xml passes stored SpreadsheetML XML through XmlScanner::scan in Xml::canRead and Xml::trySimpleXMLLoadStringPrivate, while Xml::unentity decodes numeric entities only after each DOCTYPE pattern check. A double-encoded less-than character is reduced by the first callback to another encoded character and by the second callback to a literal less-than sign, so SimpleXML receives an unchecked DOCTYPE and entity declaration. Processing attacker-controlled SpreadsheetML XML can cause entity-expansion denial of service 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 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/89f455c133e1a7e2d4abfadc43ce29eb7450d781","tags":[]},{"url":"https://github.com/PHPOffice/PhpSpreadsheet/commit/980b5c294493856f1a25754f1e8a1d2185b93738","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-rxj4-h86g-25gc","tags":[]}],"exploitRefs":[{"url":"https://github.com/PHPOffice/PhpSpreadsheet/commit/89f455c133e1a7e2d4abfadc43ce29eb7450d781","tags":[]},{"url":"https://github.com/PHPOffice/PhpSpreadsheet/commit/980b5c294493856f1a25754f1e8a1d2185b93738","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-rxj4-h86g-25gc","tags":[]}],"hasPoc":true,"ai":null}