{"items":[{"id":"NVI-00014130","kind":"vulnerability","title":"MCP Atlassian: Unauthenticated arbitrary local file read via upload_attachment file_path, chained with missing auth on streamable-http transport","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-cc5h-2pwp-pvcc","CVE-2026-77248"],"plain_summary":"GitHub lists this reviewed advisory for mcp-atlassian. 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-4daa9fcae392033d7772ce3c51a91857"],"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":"2026-09-22T20:34:45.000Z","value":"8.6 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-4daa9fcae392033d7772ce3c51a91857"}],"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-4daa9fcae392033d7772ce3c51a91857","url":"https://github.com/advisories/GHSA-cc5h-2pwp-pvcc","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-cc5h-2pwp-pvcc","publisher":"GitHub Advisory Database","observed_at":"2026-11-01T14:29:31.527Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-4daa9fcae392033d7772ce3c51a91857"],"technology":"mcp-atlassian","known_exclusions":[],"conditions_summary":"### Summary\nIn the documented multi-user HTTP deployment (`--transport streamable-http` with global operator Atlassian credentials), sooperset/mcp-atlassian exposes all tools to **unauthenticated network clients**, and the `upload_attachment` tool reads an attacker-supplied `file_path` with **no path validation**. Chained, an unauthenticated network attacker reads arbitrary files on the MCP server host (e.g. `/proc/self/environ` → the operator's Atlassian API token + `.env` secrets, `~/.ssh/id_rsa`, `/etc/passwd`) by uploading them to an attacker-chosen page/issue and reading them back.\n\n### Details\n**Missing authentication (transport):**\n- streamable-http binds `0.0.0.0` by default (`src/mcp_atlassian/__init__.py:151`).\n- The OAuth-proxy auth provider is opt-in (`ATLASSIAN_OAUTH_PROXY_ENABLE`, default false), so `main_mcp` is built with `auth=None` (`src/mcp_atlassian/servers/main.py:724-731, 813-817`).\n- `UserTokenMiddleware._parse_auth_header` sets `auth_validation_error` only for a *malformed* Authorization header; a request with **no** Authorization header passes through (`main.py:416-446, 582-595`).\n- `_get_fetcher` then falls through to the global credential fallback using t","public_affected_ranges":["< 0.22.0"]}],"null_published_at":"2026-11-02T10:00:37.211Z","source_updated_at":"2026-09-22T20:34:45.000Z","source_disclosed_at":"2026-09-22T20:34:43.000Z","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":"2026-11-01T14:29:31.527Z"}],"next_cursor":null,"snapshot_revision":"42594"}