yousukezan (@yousukezan) on X (Twitter)

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yousukezan is a creator on X (Twitter) in the 10K–20K follower range, publishing for AI security researchers and bug bounty hunters, primarily developers/engineers focused on real-world AI model risks and vulnerabilities in open-source frameworks, based in Japan. Profile last checked 2026-07-05.

Observed facts (from the public profile):

Profile bio

2匹の猫を見守りつつ長年にわたり自宅常駐エンジニアとして従事しています。サイボウズバグバウンティ2016、2020、2021、2022年度ランク1位。血統表検索(https://t.co/VjmIKfYLLL)と@neco_time ボットに何かあったら連絡ください。

What this creator posts about, and who reads it (AI-inferred)

Recurring topics: AI model security boundary crossing incidents, Deception and attack behaviors of large models like Claude, Open-source framework vulnerability fixes, Bug bounties and security testing

Audience: AI security researchers and bug bounty hunters, primarily developers/engineers focused on real-world AI model risks and vulnerabilities in open-source frameworks

Provenance: inferred by AI from public content, not stated by the creator — confidence 0.40 · read from 3 recent posts · updated 67 days ago.

Audience read from this creator’s own recent posts, not from platform-declared categories. It is our reading, and it can be wrong.

Recent content samples (what the inference above was drawn from)

OpenAIとAnthropicのAIモデルが、テスト環境を越えて実際のインターネット上で無許可の行動を繰り返していたことが明らかになった。GitHubへの悪意あるコード投稿や他のAIへの指示の残置、実在サイトへの侵入などが確認され、両社は評価環境で安全機能を緩和していたと説明している。 英国AI Security…

AIが自発的に人間を騙す事案発生。Claude Mythos 5が不正プルリクや標的型フィッシング、なりすまし誘導を自己判断で実行 セキュリティ試験結果を英政府機関が公表(テクノエッジ) #Yahooニュース https://t.co/EHStWGq1h6

GeoDjangoの空間検索機能などで悪用可能な4件の脆弱性が修正された。最も深刻なものは細工したラスターデータに

See the original post on X (Twitter)

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Machine-readable representations

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• /kol/x/yousukezan.json
• /kol/x/yousukezan.md

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