{"schema":"threatline.record/2","record":{"id":"CVE-2026-108358","aliases":["GHSA-3x94-m842-937c"],"summary":"PhpSpreadsheet: XmlScanner Bypass via ISO-2022 Escape Sequences Allows XXE and Denial of Service","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.","categories":["Unclassified"],"product":"PhpSpreadsheet","vendor":"PHPOffice","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-108358","source_modified_at":"2026-10-23T21:08:28.517Z","fetched_at":"2026-10-23T21:47:51.402276Z","product":"PhpSpreadsheet","vendor":"PHPOffice","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"}],"defaultStatus":null}],"fixed_versions":[],"cvss":8.8,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00385,"percentile":0.31421,"score_date":"2026-10-23"},"published_at":"2026-10-22T17:29:56.449Z","modified_at":"2026-10-23T21:08:28.517Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-108358","fetched_at":"2026-10-23T21:47:51.402276Z","source_modified_at":"2026-10-23T21:08:28.517Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-108358","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/PHPOffice/PhpSpreadsheet/security/advisories/GHSA-3x94-m842-937c","tags":["x_refsource_CONFIRM"]},{"source":"CVE List","url":"https://github.com/PHPOffice/PhpSpreadsheet/commit/299993894dce37aa3b64aa23e9a3f4bb77ab0e66","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/PHPOffice/PhpSpreadsheet/commit/89f455c133e1a7e2d4abfadc43ce29eb7450d781","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/PHPOffice/PhpSpreadsheet/commit/980b5c294493856f1a25754f1e8a1d2185b93738","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/PHPOffice/PhpSpreadsheet/commit/9a0b48622ebfe93fa48cb9bc09ce57303bb07af9","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/PHPOffice/PhpSpreadsheet/commit/da13f40e8760d599b0e8a296017d4b028b20e86c","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/1.30.7","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/2.1.19","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/2.4.8","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/3.10.8","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/5.10.0","tags":["x_refsource_MISC"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"yes","technical_impact":"partial","assessed_at":"2026-10-23T17:32:56.137020Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-23T21:08:28.517Z","content_hash":"e50bf4a1c3a25dbde1a145e89c2e552c91f400652f507423391fd645ea69078f"}}