CVE-2026-40902
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
PhpSpreadsheet: CPU Denial of Service via Unbounded Row Number in XLSX Row Dimensions
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.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
PhpSpreadsheet
- Vendor
- PHPOffice
- Product
- PhpSpreadsheet
- Platforms
- Unknown
- Default status
Unknown
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| < 1.30.4 | affected | Unavailable | Unavailable | Unavailable | None listed |
| >= 2.0.0, < 2.1.16 | affected | Unavailable | Unavailable | Unavailable | None listed |
| >= 2.2.0, < 2.4.5 | affected | Unavailable | Unavailable | Unavailable | None listed |
| >= 3.3.0, < 3.10.5 | affected | Unavailable | Unavailable | Unavailable | None listed |
| >= 4.0.0, < 5.7.0 | affected | Unavailable | Unavailable | Unavailable | None listed |