CVE catalog
CVE-2026-40863
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:In
- Severity
- High · CVSS 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.40% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Cpe | phpspreadsheet | Not reported | 1.30.4 | fixed |
| Cpe | phpspreadsheet | Not reported | 2.1.16 | fixed |
| Cpe | phpspreadsheet | Not reported | 2.4.5 | fixed |
| Cpe | phpspreadsheet | Not reported | 3.10.5 | fixed |
| Cpe | phpspreadsheet | Not reported | 5.7.0 | fixed |
| Cpe | phpspreadsheet | Not reported | 5.7.0 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Cpe | phpspreadsheet | cpe | Not reported | 1.30.4 | Not reported | Not reported | Not reported |
| Cpe | phpspreadsheet | cpe | Not reported | 2.1.16 | Not reported | Not reported | Not reported |
| Cpe | phpspreadsheet | cpe | Not reported | 2.4.5 | Not reported | Not reported | Not reported |
| Cpe | phpspreadsheet | cpe | Not reported | 3.10.5 | Not reported | Not reported | Not reported |
| Cpe | phpspreadsheet | cpe | Not reported | 5.7.0 | Not reported | Not reported | Not reported |
| Cpe | phpspreadsheet | cpe | Not reported | 5.7.0 | Not reported | NVD-CVE-2026-40863 | Not reported |
OpenFactory catalog packages
No matching packages in this catalog.
Observed: