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ID:12827 - Exploit for Resource exhaustion in PhpSpreadsheet - CVE-2026-59933
ID:12827 - Exploit for Resource exhaustion in PhpSpreadsheet - CVE-2026-59933
Published: July 20, 2026
Vulnerability identifier: #VU138422
Vulnerability risk: Medium
CVE-ID: CVE-2026-59933
CWE-ID: CWE-400
Exploitation vector: Remote access
Vulnerable software:
PhpSpreadsheet
PhpSpreadsheet
Link to public exploit:
Vulnerability description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to application does not properly control consumption of internal resources within XLS/OLE sector-chain self-loop. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.
Remediation
Install updates from vendor's website.