{"items":[{"id":"NVI-00013015","kind":"vulnerability","title":"Knowns Unrestricted Path Traversal leading to out-of-bounds arbitrary .md file read, write, and deletion in MCP Docs + Memory Tools","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-9gfj-28hw-jchp","CVE-2026-86439"],"plain_summary":"GitHub lists this reviewed advisory for knowns. 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-3aff9b33494f1f78b232d7cbc00ba3e5"],"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":"2026-09-25T19:32:06.000Z","value":"8.8 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-3aff9b33494f1f78b232d7cbc00ba3e5"}],"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-3aff9b33494f1f78b232d7cbc00ba3e5","url":"https://github.com/advisories/GHSA-9gfj-28hw-jchp","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-9gfj-28hw-jchp","publisher":"GitHub Advisory Database","observed_at":"2026-11-01T07:24:52.155Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-3aff9b33494f1f78b232d7cbc00ba3e5"],"technology":"knowns","known_exclusions":[],"conditions_summary":"## Overview\n\nVerified. Multiple **Unrestricted Path Traversal** vulnerabilities exist in the Knowns MCP `docs` and `memory` tools, allowing arbitrary file read, write, and deletion operations outside the project sandbox. The storage layer functions (`Get`, `Create`, `Update`, `Rename`, `Delete`) in both `doc_store.go` and `memory_store.go` concatenate user-controlled paths with `filepath.Join()` without any containment validation. \n\nAdditionally, the `docs.update` action with a `newPath` parameter performs a file deletion via `Rename()`, but is classified as `CapWrite` in the permission registry rather than `CapDelete`. This allows an attacker with a `read-write-no-delete` preset to bypass deletion restrictions and destroy arbitrary files outside the project root.\n\n## Affected paths\n\n| File Path | Role | Vulnerability & Execution Impact |\n| :--- | :--- | :--- |\n| **`internal/storage/doc_store.go`** | Vulnerable Sink (Docs) | **Path Traversal in File Operations (CWE-22):** `Get()`, `Create()`, `Update()`, `Rename()`, `Delete()` join user-controlled `path` with `filepath.Join(ds.docsDir(), ...)` without validating path containment. |\n| **`internal/storage/memory_store.go`** | Vulnera","public_affected_ranges":["<= 0.29.1"]}],"null_published_at":"2026-11-01T07:29:12.909Z","source_updated_at":"2026-09-25T19:32:06.000Z","source_disclosed_at":"2026-09-25T19:32:05.000Z","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":"2026-11-01T07:24:52.155Z"}],"next_cursor":null,"snapshot_revision":"42594"}