Risk Letters

Exploited vulnerability

CVE-2026-109618

TLP:CLEAR

PHP Memory Corruption Vulnerability

PHP contains an out-of-memory corruption vulnerability that allows for unauthenticated remote code execution.

Facts

  • Vendor: PHP Group
  • Product: PHP
  • CVSS: 9.8
  • EPSS (probability of exploitation within 30 days): 100 %
  • On CISA's Known Exploited Vulnerabilities list since: 26 October 2026
  • First known exploitation: 21 October 2026
  • CISA's deadline for US federal agencies: 29 October 2026
  • Weakness: CWE-416
  • First seen by Risk Letters: 21 October 2026

Members see which Nordic sectors the flaw hits, and what to do about it.

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Data: NVD (public domain), CISA KEV, FIRST EPSS, MITRE ATT&CK, AlienVault OTX. NVD