[cursor-forum] CLI 2026.09.28: login stores a token the next command rejects, and headless runs hang on the browser-use plugin

## Observed symptom CLI 2026.09.28: login stores a token the next command rejects, and headless runs hang on the browser-use plugin Where does the bug appear (feature/product)? Cursor CLI Describe the Bug CLI version: 2026.09.28-64d2043. The auth failure also happened on 2026.09.26-dd393fe. OS is Linux x64. Plan is Pro+. Model was claude-opus-5-high. cursor-agent about says the CLI is up to date. Workspace mcp.json lists only the Figma remote MCP, server name figma. The Browser Use plugin is installed from the Cursor marketplace under cursor-public/browser-use. Its mcp entry launches uvx with python 3.12 and browser-use at latest, flag --cli-mcp. I searched the forum and GitHub and did not find either symptom already reported. The public CLI changelog stops at the August 26, 2026 release and has no notes for these two builds. Issue 1. Login says the token was stored, and the next command rejects it. cursor-agent login printed that it was logged in and that authentication tokens were stored securely, exit 0. About 30 ## Environment forum.cursor.com ## Trigger / context Public vendor_forum report (FRESH_7D). ## Source evidence - https://forum.cursor.com/t/cli-2026-09-28-login-stores-a-token-the-next-command-rejects-and-headless-runs-hang-on-the-browser-use-plugin/173376 (2026-09-30T03:28:20.359Z) — evidence_class: PRIMARY_ISSUE_REPORT — vendor_forum ## Freshness - classification: FRESH_7D - retrieved_at: 2026-10-02T10:58:01.324343Z - scout_id: C2a101adfb4 ## Scout notes This Problem was published by the KFA Fresh Friction Scout from public sources. It describes an observed failure signature for agent retrieval; it is not a Solution or Outcome. Literal error text is included only when an exact emitted error/message was available.