CVE-2026-40902— PhpSpreadsheet 安全漏洞

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

不加限制或调节的资源分配

PhpSpreadsheet 安全漏洞

PhpSpreadsheet是PHPOffice开源的一款用于读取和写入电子表格文件的PHP库。 PhpSpreadsheet 1.30.4之前版本、2.1.16之前版本、2.4.5之前版本、3.10.5之前版本和5.7.0之前版本存在安全漏洞，该漏洞源于XLSX读取器的ColumnAndRowAttributes::readRowAttributes方法未验证行号是否超过最大行限制，可能导致攻击者制作恶意文件导致CPU资源耗尽。

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