CVE-2026-40863

{"id": "CVE-2026-40863", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-40863", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-05-13T15:01:42.488212Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "PHPOffice", "product": "PhpSpreadsheet", "versions": [{"status": "affected", "version": "< 1.30.4"}, {"status": "affected", "version": ">= 2.0.0, < 2.1.16"}, {"status": "affected", "version": ">= 2.2.0, < 2.4.5"}, {"status": "affected", "version": ">= 3.3.0, < 3.10.5"}, {"status": "affected", "version": ">= 4.0.0, < 5.7.0"}]}]}], "published": "2026-05-12T22:16:33.783", "references": [{"url": "https://github.com/PHPOffice/PhpSpreadsheet/security/advisories/GHSA-84wq-86v6-x5j6", "tags": ["Exploit", "Mitigation", "Vendor Advisory"], "source": "security-advisories@github.com"}, {"url": "https://github.com/PHPOffice/PhpSpreadsheet/security/advisories/GHSA-84wq-86v6-x5j6", "tags": ["Exploit", "Mitigation", "Vendor Advisory"], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-770"}]}], "descriptions": [{"lang": "en", "value": "PhpSpreadsheet is a pure PHP library for reading and writing spreadsheet files. Prior to 1.30.4, 2.1.16, 2.4.5, 3.10.5, and 5.7.0, the SpreadsheetML XML reader (Reader\\Xml) does not validate the ss:Index row attribute against the maximum allowed row count (AddressRange::MAX_ROW = 1,048,576). An attacker can craft a SpreadsheetML XML file with ss:Index=\"999999999\" on a <Row> element, which inflates the internal cachedHighestRow to ~1 billion. Any subsequent call to getRowIterator() without an explicit end row will attempt to iterate ~1 billion rows, causing CPU exhaustion and denial of service. This vulnerability is fixed in 1.30.4, 2.1.16, 2.4.5, 3.10.5, and 5.7.0."}, {"lang": "es", "value": "PhpSpreadsheet es una biblioteca PHP pura para leer y escribir archivos de hoja de c\u00e1lculo. Antes de 1.30.4, 2.1.16, 2.4.5, 3.10.5 y 5.7.0, el lector XML de SpreadsheetML (Reader\\Xml) no valida el atributo de fila ss:Index contra el recuento m\u00e1ximo de filas permitido (AddressRange::MAX_ROW = 1,048,576). Un atacante puede crear un archivo XML de SpreadsheetML con ss:Index=\u2019999999999\u2019 en un elemento [Row], lo que infla el cachedHighestRow interno a ~mil millones. Cualquier llamada subsiguiente a getRowIterator() sin una fila final expl\u00edcita intentar\u00e1 iterar ~mil millones de filas, causando agotamiento de CPU y denegaci\u00f3n de servicio. Esta vulnerabilidad est\u00e1 corregida en 1.30.4, 2.1.16, 2.4.5, 3.10.5 y 5.7.0."}], "lastModified": "2026-10-26T18:10:00.173", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:phpoffice:phpspreadsheet:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "21F2C6F6-C903-4A65-BCB4-4549FE752ED5", "versionEndExcluding": "1.30.4"}, {"criteria": "cpe:2.3:a:phpoffice:phpspreadsheet:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E27B01CE-562C-4746-A7F5-E402B25F0B47", "versionEndExcluding": "2.1.16", "versionStartIncluding": "2.0.0"}, {"criteria": "cpe:2.3:a:phpoffice:phpspreadsheet:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "46FF2D5E-816F-481B-AA45-41BA6EDCFEA0", "versionEndExcluding": "2.4.5", "versionStartIncluding": "2.2.0"}, {"criteria": "cpe:2.3:a:phpoffice:phpspreadsheet:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "DF58DF5C-8F1B-4B1B-80A0-001B47751D9F", "versionEndExcluding": "3.10.5", "versionStartIncluding": "3.3.0"}, {"criteria": "cpe:2.3:a:phpoffice:phpspreadsheet:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "DD7DEDE3-C624-4524-9B08-08B92F28C40C", "versionEndExcluding": "5.7.0", "versionStartIncluding": "4.0.0"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}