PHP Vulnerability Responses by Company

kubell

Japan-based services
Aliases / services
株式会社kubell / Chatwork / チャットワーク / 株式会社Chatwork / kubell
Official website
https://www.kubell.com/

Each response applies only to its stated service scope. “Not listed” does not mean unpatched or unaffected.

Response status by service

Chatwork

Response status
Preventive maintenance completed; service resumed
Response information checked
2026-10-28

Current re-audit: Official response verified · Research date: 2026-10-28

Operator of the Chatwork business chat service.

Preventive emergency maintenance for the PHP vulnerability ran from October 21 at 23:00 to October 22 at 00:15 JST, after which service resumed.

Scope: Confirms preventive action and Chatwork service resumption; installed PHP versions and individual patch details are not specified.

What users should do

Use normally and check current incident notices if problems persist.

Official service URL

Source URLs

  1. Chatwork emergency maintenance completionhttps://help.chatwork.com/hc/ja/articles/63472833574937Response evidence
  2. https://help.chatwork.com/hc/ja/sections/201963352-メンテナンス-障害-その他https://help.chatwork.com/hc/ja/sections/201963352-メンテナンス-障害-その他Service and operation documentation
Related official sources
  1. Chatwork emergency maintenance completionOfficial notice
  2. Company and operator informationOfficial information directory

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