| Summary | 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. |
|---|---|
| Publication Date | May 13, 2026, 7:16 a.m. |
| Registration Date | May 15, 2026, 4:18 a.m. |
| Last Update | May 14, 2026, 11:50 p.m. |
| CVSS3.1 : HIGH | |
| スコア | 7.5 |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| 攻撃元区分(AV) | ネットワーク |
| 攻撃条件の複雑さ(AC) | 低 |
| 攻撃に必要な特権レベル(PR) | 不要 |
| 利用者の関与(UI) | 不要 |
| 影響の想定範囲(S) | 変更なし |
| 機密性への影響(C) | なし |
| 完全性への影響(I) | なし |
| 可用性への影響(A) | 高 |
| Configuration1 | or higher | or less | more than | less than | |
| cpe:2.3:a:phpoffice:phpspreadsheet:*:*:*:*:*:*:*:* | 1.30.4 | ||||
| cpe:2.3:a:phpoffice:phpspreadsheet:*:*:*:*:*:*:*:* | 2.0.0 | 2.1.16 | |||
| cpe:2.3:a:phpoffice:phpspreadsheet:*:*:*:*:*:*:*:* | 2.2.0 | 2.4.5 | |||
| cpe:2.3:a:phpoffice:phpspreadsheet:*:*:*:*:*:*:*:* | 3.3.0 | 3.10.5 | |||
| cpe:2.3:a:phpoffice:phpspreadsheet:*:*:*:*:*:*:*:* | 4.0.0 | 5.7.0 | |||