← Claude Code

Claude Code 2.1.266

Released Sep 08, 2026 · official source

Safe to upgrade? Many reports – consider waiting

13 bug/regression-labelled issues opened in the 20h after release (13 regression-flagged, 1 mention v2.1.266 in title). Normalised score 140.0.

Issues counted
  • #93165 [BUG] Dictation mic button disappears from composer once there's text — regression of the v1.46388.1 fix (macOS 1.49585.0) (bug, platform:macos, regression, area:desktop)
  • #93142 [BUG] Windows desktop 1.49585.0 — computer use app-permission card for File Explorer shows only "Deny", no "Allow" (bug, platform:windows, regression, area:desktop)
  • #93118 [BUG] Cowork Windows — remote-bash reports "no Plan9 drive shares mounted" after Sept 2026 Windows update; host registers 7 shares successfully (bug, has repro, platform:windows, area:cowork, regression)
  • #93089 SendMessage (cross-session messaging) disabled in Desktop app's Code tab, works fine from terminal — same account, same version (bug, has repro, platform:macos, area:agents, regression, area:desktop)
  • #93057 CLAUDE_PLUGIN_ROOT unset in agent Bash env, and still source-dir in hooks, for string-source local marketplace plugins (2.1.265) (bug, has repro, platform:macos, area:bash, area:hooks, regression, area:plugins)
  • #93043 statusLine stops rendering under cmux after updating from 2.1.263 (blank, no error) (bug, has repro, platform:macos, area:tui, regression, area:statusline)
  • #93038 [BUG] Claude Code 2.1.266 crashes with "Bus error" on WSL2 (npm/NVM install) — 2.1.265 works (bug, has repro, regression, platform:wsl)
  • #93022 [BUG] VS Code extension ignores claudeCode.useTerminal and renders a blank activity-bar icon on VS Code 1.136.2 (correct on 1.135.0) (bug, has repro, area:ide, platform:vscode, regression)
  • #93006 Desktop: WSL section missing entirely from environment picker on new session screen (regression after update to 1.49585.0) (bug, has repro, platform:windows, regression, platform:wsl, area:desktop)
  • #92977 [BUG] Cowork local sandbox not mounting after update in Claude Desktop 1.49585.0.0 (Windows) (bug, duplicate, platform:windows, external, area:cowork, regression, area:sandbox)
  • #92976 Dispatch start_code_task still blocked in 1.49585.0: opening a finished session in the UI re-locks the folder (follow-up to #91745, #92452, #92462) (bug, has repro, platform:linux, regression, area:desktop)
  • #92975 Abrir em no explorador de arquivos do painel nao abre / falta preview e abrir no Word para .docx (bug, platform:windows, regression, area:desktop)
  • #92972 [BUG] Scheduled-task sessions never register with Remote Control / no session appears in mobile app (duplicate, platform:windows, regression, area:desktop, area:routines)

How this is computed

Changelog: v2.1.266

What's changed