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Japan Suspends Government and Private Web Services After Critical PHP Vulnerability

Authorities have taken affected sites offline to apply patches, carry out emergency checks, and maintain heightened monitoring to guard against breaches.

Overview

  • The government confirmed on Thursday that it has received no reports of damage linked to a newly disclosed critical vulnerability in the programming language PHP.
  • Independent Administrative Institution Information System and Ministry of Land, Infrastructure announced temporary suspension of the My Number portal and some ministry web pages to perform emergency inspections and install fixes.
  • Multiple banks and securities firms have paused customer-facing online services or run urgent maintenance, though the All Banks Association said interbank settlement systems show no confirmed impact.
  • Officials urged organizations to apply vendor patches where possible and recommended temporary site shutdowns when patching is difficult because PHP deployments and dependencies vary across systems.
  • The incident highlights how widely PHP is used in web services and underscores the need for rapid coordinated action between government and private operators to limit exposure and protect users.