{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-108358", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-10-09T20:32:44.301Z", "datePublished": "2026-10-22T17:29:56.449Z", "dateUpdated": "2026-10-22T17:29:56.449Z"}, "containers": {"cna": {"title": "PhpSpreadsheet: XmlScanner Bypass via ISO-2022 Escape Sequences Allows XXE and Denial of Service", "problemTypes": [{"descriptions": [{"cweId": "CWE-611", "lang": "en", "description": "CWE-611: Improper Restriction of XML External Entity Reference", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-776", "lang": "en", "description": "CWE-776: Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "LOW", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 8.8, "baseSeverity": "HIGH", "vectorString": "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", "version": "4.0"}}], "references": [{"name": "https://github.com/PHPOffice/PhpSpreadsheet/security/advisories/GHSA-3x94-m842-937c", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/PHPOffice/PhpSpreadsheet/security/advisories/GHSA-3x94-m842-937c"}, {"name": "https://github.com/PHPOffice/PhpSpreadsheet/commit/299993894dce37aa3b64aa23e9a3f4bb77ab0e66", "tags": ["x_refsource_MISC"], "url": "https://github.com/PHPOffice/PhpSpreadsheet/commit/299993894dce37aa3b64aa23e9a3f4bb77ab0e66"}, {"name": "https://github.com/PHPOffice/PhpSpreadsheet/commit/89f455c133e1a7e2d4abfadc43ce29eb7450d781", "tags": ["x_refsource_MISC"], "url": "https://github.com/PHPOffice/PhpSpreadsheet/commit/89f455c133e1a7e2d4abfadc43ce29eb7450d781"}, {"name": "https://github.com/PHPOffice/PhpSpreadsheet/commit/980b5c294493856f1a25754f1e8a1d2185b93738", "tags": ["x_refsource_MISC"], "url": "https://github.com/PHPOffice/PhpSpreadsheet/commit/980b5c294493856f1a25754f1e8a1d2185b93738"}, {"name": "https://github.com/PHPOffice/PhpSpreadsheet/commit/9a0b48622ebfe93fa48cb9bc09ce57303bb07af9", "tags": ["x_refsource_MISC"], "url": "https://github.com/PHPOffice/PhpSpreadsheet/commit/9a0b48622ebfe93fa48cb9bc09ce57303bb07af9"}, {"name": "https://github.com/PHPOffice/PhpSpreadsheet/commit/da13f40e8760d599b0e8a296017d4b028b20e86c", "tags": ["x_refsource_MISC"], "url": "https://github.com/PHPOffice/PhpSpreadsheet/commit/da13f40e8760d599b0e8a296017d4b028b20e86c"}, {"name": "https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/1.30.7", "tags": ["x_refsource_MISC"], "url": "https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/1.30.7"}, {"name": "https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/2.1.19", "tags": ["x_refsource_MISC"], "url": "https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/2.1.19"}, {"name": "https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/2.4.8", "tags": ["x_refsource_MISC"], "url": "https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/2.4.8"}, {"name": "https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/3.10.8", "tags": ["x_refsource_MISC"], "url": "https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/3.10.8"}, {"name": "https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/5.10.0", "tags": ["x_refsource_MISC"], "url": "https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/5.10.0"}], "affected": [{"vendor": "PHPOffice", "product": "PhpSpreadsheet", "versions": [{"version": "< 1.30.7", "status": "affected"}, {"version": ">= 2.0.0, < 2.1.19", "status": "affected"}, {"version": ">= 2.2.0, < 2.4.8", "status": "affected"}, {"version": ">= 3.3.0, < 3.10.8", "status": "affected"}, {"version": ">= 4.0.0, < 5.10.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-10-22T17:29:56.449Z"}, "descriptions": [{"lang": "en", "value": "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."}], "source": {"advisory": "GHSA-3x94-m842-937c", "discovery": "UNKNOWN"}}}}

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