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CVE-2026-59933 PhpSpreadsheet: XLS/OLE sector-chain self-loop causes memory exhaustion

🗓️ 28 Jul 2026 17:29:27Reported by GoogleType 
osv
 osv
🔗 osv.dev👁 4 Views

PhpSpreadsheet Ole reader loops on attacker XLS data causing memory exhaustion; fixed in updated releases.

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29 Jul 2026 03:47Current
6.9Medium risk
Vulners AI Score6.9
CVSS 3.17.5
4