{"items":[{"id":"NVI-00018615","kind":"vulnerability","title":"Cline Kanban Server has a Cross-Origin WebSocket Hijacking Vulnerability","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-5c57-rqjx-35g2","CVE-2026-44211"],"plain_summary":"GitHub lists this reviewed advisory for cline. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-44d0201415c02dbc5d19761d3880f7a1"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-06-09T10:50:03.000Z","value":"9.6 critical","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-44d0201415c02dbc5d19761d3880f7a1"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-44d0201415c02dbc5d19761d3880f7a1","url":"https://github.com/advisories/GHSA-5c57-rqjx-35g2","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-5c57-rqjx-35g2","publisher":"GitHub Advisory Database","observed_at":"2026-11-06T20:56:39.448Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-44d0201415c02dbc5d19761d3880f7a1"],"technology":"cline","known_exclusions":[],"conditions_summary":"## Summary\n\nThe `kanban` npm package (used by the `cline` CLI) starts a WebSocket server on `127.0.0.1:3484` with no Origin header validation. Any website a developer visits can silently connect to the kanban server via WebSocket and:\n\n1. Leak sensitive data in real-time: workspace filesystem paths, task titles/descriptions, git branch info, AI agent chat messages\n2. Hijack running AI agent terminals by injecting arbitrary prompts into the agent's input, leading to remote code execution\n3. Kill running agent tasks by terminating active sessions via the control WebSocket\n\nWebSocket connections are not subject to CORS restrictions. The browser sends them freely to localhost regardless of the page's origin. The kanban server accepts all connections without checking the Origin header.\n\n## Affected Component\n\n- Package: `kanban` on npm (https://www.npmjs.com/package/kanban)\n- Repository: https://github.com/cline/kanban\n- Tested version: 0.1.59\n- Installed via: `cline` CLI (`cline --kanban` or default `cline` command)\n- Endpoints: `ws://127.0.0.1:3484/api/runtime/ws`, `ws://127.0.0.1:3484/api/terminal/io`, `ws://127.0.0.1:3484/api/terminal/control`\n\n## Root Cause\n\nThree WebSocket endpoin","public_affected_ranges":["<= 2.13.0"]}],"null_published_at":"2026-11-07T07:07:39.863Z","source_updated_at":"2026-06-09T10:50:03.000Z","source_disclosed_at":"2026-05-08T20:43:17.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"First indexed by Null; source disclosure date is shown separately.","null_first_observed_at":"2026-11-06T20:56:39.448Z"}],"next_cursor":null,"snapshot_revision":"42594"}