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PHPSpreadsheet: XLS/OLE sector-chain self-loop causes memory exhaustion

🗓️ 23 Jul 2026 15:01:50Reported by GitHub Advisory DatabaseType 
github
 github
🔗 github.com👁 12 Views

PhpSpreadsheet OLE reader can loop on sector chain in malicious XLS OLE metadata, exhausting memory.

Related
Detection
Refs
Vulners
Node
OR
phpofficephpspreadsheetRange1.30.5composer
phpofficephpspreadsheetRange2.0.02.1.17composer
phpofficephpspreadsheetRange2.2.02.4.6composer
phpofficephpspreadsheetRange3.3.03.10.6composer
phpofficephpspreadsheetRange4.0.05.8.0composer

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23 Jul 2026 15:01Current
5.4Medium risk
Vulners AI Score5.4
CVSS 3.17.5
EPSS0.00691
SSVC
12