LY Corporation

Companies / web services

Aliases / services: LINEヤフー / LY Corporation / 旧LINE / LINEヤフー株式会社
Official website: https://www.lycorp.co.jp/

Sources identifying the operating company

https://www.lycorp.co.jp/ja/news/announcements/007712/

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

Response status by service

LINE-related usage and communication systems

Response status: Not listed
Response information checked: 2026-10-29

Current re-audit: Related incident verified; PHP connection not stated · Research date: 2026-10-29

The final scope investigation for the 2023 incident was reported on 14 February 2024. Some 302,980 user-data records were affected or potentially affected, including usage history linked to internal identifiers. LINE chats, card details and bank details were excluded.

Scope: A PHP connection and response to the current PHP vulnerabilities are not listed.

What users should do

The notice stated no mandatory user action. Watch for impersonation and phishing, and verify individual notices through official channels.

Official service URL

https://www.lycorp.co.jp/

Source URLs

Official operator informationhttps://www.lycorp.co.jp/ja/news/announcements/007712/Service and operation documentation

Related official sources

Official operator informationOfficial information directoryOfficial evidence identifying LY Corporation and the relevant business.
Data disclosure report (updated 14 February 2024)Official notice; link to this PHP incident unconfirmedThe final scope investigation for the 2023 incident was reported on 14 February 2024.