Multiple Critical Vulnerabilities Found in PHP, Fixes Scheduled for October 21
The PHP security team has identified multiple serious vulnerabilities in the widely used scripting language. Two distinct flaws have been confirmed, each carrying a CVSSv4.0 base score of 9.2 and classified as Critical.
The team issued an advance notice on October 20, 2026, stating that corrected versions will be released on October 21 at 14:00 UTC (23:00 Japan time). Full technical details, including affected components and version ranges, will be disclosed alongside the patches.
Administrators are advised to prepare for rapid deployment of the updates. The PHP team noted that the release schedule may be accelerated if vulnerability information becomes public or evidence of active exploitation emerges.
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