{"generator":"GNU social 2.0.2-dev","title":"Conversation","totalItems":1,"items":[{"actor":{"id":"https:\/\/mastodon.social\/users\/MastodonEngineering","displayName":"Mastodon Engineering","status_net":{"avatarLinks":[{"url":"https:\/\/gnusocial.jp\/avatar\/151944-original-tmp20230721134444.webp","rel":"avatar","type":"image\/webp","width":400,"height":400},{"url":"https:\/\/gnusocial.jp\/avatar\/151944-96-20230727115458.webp","rel":"avatar","type":"image\/webp","width":96,"height":96},{"url":"https:\/\/gnusocial.jp\/avatar\/151944-48-20230727115502.webp","rel":"avatar","type":"image\/webp","width":48,"height":48},{"url":"https:\/\/gnusocial.jp\/avatar\/151944-24-20230727115502.webp","rel":"avatar","type":"image\/webp","width":24,"height":24}],"profile_info":{"local_id":"151944"}},"image":{"url":"https:\/\/gnusocial.jp\/avatar\/151944-96-20230727115458.webp","rel":"avatar","type":"image\/webp","width":96,"height":96},"objectType":"person","summary":"We&#39;re building open source, decentralized social media that gives people back control over their data and their reach.","url":"https:\/\/mastodon.social\/@MastodonEngineering","portablecontacts_net":{"preferredUsername":"MastodonEngineering","displayName":"Mastodon Engineering","note":"We&#39;re building open source, decentralized social media that gives people back control over their data and their reach."}},"content":"<p>We just released Mastodon 4.5.5, 4.4.12, and 4.3.18.<\/p><p>These versions contain various bug fixes, including very important (1 high severity, 3 moderate severity) security fixes.<\/p><p>Mastodon 4.2 is now unsupported, so if you still run it, please update to a supported version as soon as you can.<\/p><p>Full release notes and update instructions are available on the GitHub releases page.<\/p><p><a href=\"https:\/\/github.com\/mastodon\/mastodon\/releases\" rel=\"nofollow\">https:\/\/github.com\/mastodon\/mastodon\/releases<\/a><\/p><p><a href=\"https:\/\/mastodon.social\/tags\/mastoadmin\" class=\"mention hashtag\" rel=\"tag\">#mastoadmin<\/a><\/p>","generator":{"id":"tag:gnusocial.jp,2026-05-31:notice-source:ActivityPub","objectType":"application","status_net":{"source_code":"ActivityPub"}},"id":"https:\/\/mastodon.social\/users\/MastodonEngineering\/statuses\/115928196923390926","object":{"id":"https:\/\/mastodon.social\/users\/MastodonEngineering\/statuses\/115928196923390926","objectType":"note","content":"<p>We just released Mastodon 4.5.5, 4.4.12, and 4.3.18.<\/p><p>These versions contain various bug fixes, including very important (1 high severity, 3 moderate severity) security fixes.<\/p><p>Mastodon 4.2 is now unsupported, so if you still run it, please update to a supported version as soon as you can.<\/p><p>Full release notes and update instructions are available on the GitHub releases page.<\/p><p><a href=\"https:\/\/github.com\/mastodon\/mastodon\/releases\" rel=\"nofollow\">https:\/\/github.com\/mastodon\/mastodon\/releases<\/a><\/p><p><a href=\"https:\/\/mastodon.social\/tags\/mastoadmin\" class=\"mention hashtag\" rel=\"tag\">#mastoadmin<\/a><\/p>","url":"https:\/\/mastodon.social\/@MastodonEngineering\/115928196923390926","status_net":{"notice_id":null}},"to":[{"objectType":"http:\/\/activitystrea.ms\/schema\/1.0\/collection","id":"http:\/\/activityschema.org\/collection\/public"}],"status_net":{"conversation":"tag:gnusocial.jp,2026-01-20:objectType=thread:nonce=9901817e2c78e81c","notice_info":{"local_id":"11966847","source":"ActivityPub"}},"published":"2026-01-20T15:45:07+00:00","provider":{"objectType":"service","displayName":"GNU social JP","url":"https:\/\/gnusocial.jp\/"},"verb":"post","url":"https:\/\/mastodon.social\/@MastodonEngineering\/115928196923390926"}],"links":[{"url":"https:\/\/gnusocial.jp\/conversation\/6076675","rel":"alternate","type":"text\/html"}]}