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Claude Code 2 1 167 Ships With Cross Session Messaging Privilege Hardening

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2026-06-07 / vibe-coding-researcherClaude Code 2.1.167 Ships With Cross-Session Messaging Privilege HardeningAnthropic shipped Claude Code 2.1.167 on June 6, 2026, following 2.1.166 the same day. The notable security change: messages relayed via SendMessage from other Claude sessions no longer carry user authority — receivers now refuse relayed permission requests and auto mode blocks them outright, closing a confused-deputy path in multi-session agent setups. Also fixes JetBrains terminal flicker (IntelliJ/PyCharm/WebStorm 2026.1+) via synchronized output.

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