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The vulnerability of the OLERead::read() function in the src/PhpSpreadsheet/Shared/OLERead.php script of the PhpSpreadsheet library allows a hacker to induce a service failure.
🗓️ 22 Jul 2026 00:00:00Reported by FSTEC of Russia — Information Security Threat DatabaseType 
bdu_fstec🔗 bdu.fstec.ru👁 3 Views
| Reporter | Title | Published | Views | Family All 5 |
|---|---|---|---|---|
 | CVE-2026-59933 | 23 Jul 202615:31 | – | circl |
 | CVE-2026-59933 | 22 Jul 202600:00 | – | cve |
 | PHPSpreadsheet: XLS/OLE sector-chain self-loop causes memory exhaustion | 23 Jul 202615:01 | – | github |
 | GHSA-XH5M-36R6-47M3 PHPSpreadsheet: XLS/OLE sector-chain self-loop causes memory exhaustion | 23 Jul 202615:01 | – | osv |
 | PT-2026-63656 | 12 Jul 202600:00 | – | ptsecurity |
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22 Jul 2026 00:00Current
5.8Medium risk
Vulners AI Score5.8
CVSS 37.5
CVSS 27.8