Infinite loop Affecting phpoffice/phpspreadsheet package, versions <1.30.6>=2.0.0, <2.1.18>=2.2.0, <2.4.7>=3.3.0, <3.10.7>=4.0.0, <5.8.1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-PHP-PHPOFFICEPHPSPREADSHEET-18307198
- published25 Jul 2026
- disclosed23 Jul 2026
- creditUnknown
Introduced: 23 Jul 2026
NewCVE-2026-59933 (opens in a new tab)How to fix?
Upgrade phpoffice/phpspreadsheet to version 1.30.6, 2.1.18, 2.4.7, 3.10.7, 5.8.1 or higher.
Overview
phpoffice/phpspreadsheet is a Spreadsheet engine that Read, Create and Write Spreadsheet documents in PHP .
Affected versions of this package are vulnerable to Infinite loop through the read function. An attacker can cause the application to exhaust system memory and crash by submitting a specially crafted XLS/OLE file containing a self-referential sector chain, leading to repeated data processing without termination.