{"cve":{"cve_id":"CVE-2026-40902","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":0.00395,"epss_percentile":0.31213,"epss_as_of":"2026-06-23","description":"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 XLSX reader's ColumnAndRowAttributes::readRowAttributes() method reads row numbers from XML attributes without validating them against the spreadsheet maximum row limit (AddressRange::MAX_ROW = 1,048,576). An attacker can craft a minimal XLSX file (~1.6KB) containing a <row r=\"999999999\"/> element that inflates cachedHighestRow to 999,999,999, causing any subsequent row iteration to attempt ~1 billion loop cycles and exhaust CPU resources. This vulnerability is fixed in 1.30.4, 2.1.16, 2.4.5, 3.10.5, and 5.7.0.","published_at":"2026-05-12T22:02:39.802000Z","last_modified_at":null,"cvss_v3_score":7.5,"cvss_v3_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cvss_v3_severity":"HIGH","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":["CWE-770"],"nvd_references":["https://github.com/PHPOffice/PhpSpreadsheet/security/advisories/GHSA-7c6m-4442-2x6m"],"vuln_status":null,"trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-24T00:09:39.878444Z","updated_at":"2026-06-28T23:30:13.586728Z"},"effective_severity":"HIGH","badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"N","value_label":"Network"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"PR","name":"Privileges Required","value":"N","value_label":"None"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"S","name":"Scope","value":"U","value_label":"Unchanged"},{"metric":"C","name":"Confidentiality","value":"N","value_label":"None"},{"metric":"I","name":"Integrity","value":"N","value_label":"None"},{"metric":"A","name":"Availability","value":"H","value_label":"High"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"phpoffice","vendor_name":"PHPOffice","product_slug":"phpspreadsheet","product_name":"PhpSpreadsheet","version_start":"< 1.30.4","version_start_inclusive":true,"version_end":"< 1.30.4","version_end_inclusive":true,"cpe23_uri":"cve5:phpoffice:phpspreadsheet:< 1.30.4:< 1.30.4"},{"vendor_slug":"phpoffice","vendor_name":"PHPOffice","product_slug":"phpspreadsheet","product_name":"PhpSpreadsheet","version_start":">= 2.0.0, < 2.1.16","version_start_inclusive":true,"version_end":">= 2.0.0, < 2.1.16","version_end_inclusive":true,"cpe23_uri":"cve5:phpoffice:phpspreadsheet:>= 2.0.0, < 2.1.16:>= 2.0.0, < 2.1.16"},{"vendor_slug":"phpoffice","vendor_name":"PHPOffice","product_slug":"phpspreadsheet","product_name":"PhpSpreadsheet","version_start":">= 2.2.0, < 2.4.5","version_start_inclusive":true,"version_end":">= 2.2.0, < 2.4.5","version_end_inclusive":true,"cpe23_uri":"cve5:phpoffice:phpspreadsheet:>= 2.2.0, < 2.4.5:>= 2.2.0, < 2.4.5"},{"vendor_slug":"phpoffice","vendor_name":"PHPOffice","product_slug":"phpspreadsheet","product_name":"PhpSpreadsheet","version_start":">= 3.3.0, < 3.10.5","version_start_inclusive":true,"version_end":">= 3.3.0, < 3.10.5","version_end_inclusive":true,"cpe23_uri":"cve5:phpoffice:phpspreadsheet:>= 3.3.0, < 3.10.5:>= 3.3.0, < 3.10.5"},{"vendor_slug":"phpoffice","vendor_name":"PHPOffice","product_slug":"phpspreadsheet","product_name":"PhpSpreadsheet","version_start":">= 4.0.0, < 5.7.0","version_start_inclusive":true,"version_end":">= 4.0.0, < 5.7.0","version_end_inclusive":true,"cpe23_uri":"cve5:phpoffice:phpspreadsheet:>= 4.0.0, < 5.7.0:>= 4.0.0, < 5.7.0"}],"exploit_refs":[],"news":[],"references":[{"url":"https://github.com/PHPOffice/PhpSpreadsheet/security/advisories/GHSA-7c6m-4442-2x6m","source_type":"VENDOR_ADVISORY","tags":["advisory"]}],"timeline":[{"type":"published","at":"2026-05-12T22:02:39.802000Z","label":"CVE published","source":null},{"type":"cvss_changed","at":"2026-06-28T17:53:54.482027Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:53:54.482027Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:53:54.482027Z","label":"CVSS score revised","source":"cvelistv5"}]}