Incorrect Authorization Affecting phpoffice/phpspreadsheet package, versions >=4.0.0, <5.10.0>=3.3.0, <3.10.8>=2.2.0, <2.4.8>=2.0.0, <2.1.19<1.30.7
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
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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Start learning- Snyk IDSNYK-PHP-PHPOFFICEPHPSPREADSHEET-21700351
- published25 Oct 2026
- disclosed22 Oct 2026
- creditzx (Jace)
Introduced: 22 Oct 2026
NewCVE-2026-108360 (opens in a new tab)How to fix?
Upgrade phpoffice/phpspreadsheet to version 5.10.0, 3.10.8, 2.4.8, 2.1.19, 1.30.7 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 Incorrect Authorization via the ODS file reader in src/PhpSpreadsheet/Reader/Ods.php and the XML scanner in src/PhpSpreadsheet/Reader/Security/XmlScanner.php, where an attacker can supply a malicious ODS document containing an external entity reference to cause the server to disclose internal files or make server-side requests. The patch also hardens table:number-rows-repeated and table:number-columns-repeated attribute handling to prevent integer overflow-based resource exhaustion when parsing ODS files.