{"items":[{"id":"NVI-00014019","kind":"vulnerability","title":"MCP Atlassian: MCP HTTP Client Server-Local File Exfiltration via Unvalidated Attachment Upload Path","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-wv8v-v4c5-v75j","CVE-2026-77246"],"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-02f63be3a6f917ba983103a85af95e39"],"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":"2026-09-22T20:34:46.000Z","value":"7.4 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-32857be1562e16ded1e48e2d903a5deb"},{"kind":"EPSS","as_of":"2026-11-03T12:00:27.000Z","value":"0.471%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.40776. Missing scores are unknown.","source_id":"sr-02f63be3a6f917ba983103a85af95e39"}],"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-32857be1562e16ded1e48e2d903a5deb","url":"https://github.com/advisories/GHSA-wv8v-v4c5-v75j","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-wv8v-v4c5-v75j","publisher":"GitHub Advisory Database","observed_at":"2026-11-01T14:29:31.527Z"},{"id":"sr-02f63be3a6f917ba983103a85af95e39","url":"https://www.first.org/epss/data.html","basis":"official_catalog","notes":"FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.","title":"CVE-2026-77246","publisher":"FIRST EPSS","observed_at":"2026-11-03T17:45:16.081Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-32857be1562e16ded1e48e2d903a5deb"],"technology":"mcp-atlassian","known_exclusions":[],"conditions_summary":"### Summary\n\nThe `mcp-atlassian` server exposes an MCP tool (`confluence_upload_attachment` and the Jira attachment variant) that accepts an arbitrary server-side file path and opens it for upload without any path validation. When the server is deployed in HTTP transport mode (`streamable-http` or `sse`), a remote, unauthenticated attacker can supply attacker-controlled Atlassian service headers (`X-Atlassian-Confluence-Url` / `X-Atlassian-Confluence-Personal-Token`) to redirect the upload to an attacker-controlled endpoint, then pass an arbitrary `file_path` (e.g. `/etc/passwd`, `~/.env`, SSH private keys, cloud credentials) to exfiltrate any file readable by the server process. No prior account, session token, or `Authorization` header is required. The vulnerability was confirmed through both static code analysis (Phase 1) and a live Docker-based proof-of-concept (Phase 2).\n\n---\n\n### Details\n\n**Data flow (source → sink)**\n\n| Step | Location | Role |\n|------|----------|------|\n| 1 | `src/mcp_atlassian/servers/main.py:498-504` | Middleware extracts `X-Atlassian-Confluence-Url` and `X-Atlassian-Confluence-Personal-Token` from incoming HTTP request headers. |\n| 2 | `src/mcp_atlassian","public_affected_ranges":["< 0.22.0"]}],"null_published_at":"2026-11-04T10:04:41.538Z","source_updated_at":"2026-09-22T20:34:46.000Z","source_disclosed_at":"2026-09-22T20:34:45.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Dated EPSS estimate updated; this is not a new disclosure or proof of exploitation.","null_first_observed_at":"2026-11-01T14:29:31.527Z"},{"id":"NVI-00014019","kind":"vulnerability","title":"MCP Atlassian: MCP HTTP Client Server-Local File Exfiltration via Unvalidated Attachment Upload Path","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-wv8v-v4c5-v75j","CVE-2026-77246"],"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-32857be1562e16ded1e48e2d903a5deb"],"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":"2026-09-22T20:34:46.000Z","value":"7.4 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-32857be1562e16ded1e48e2d903a5deb"}],"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-32857be1562e16ded1e48e2d903a5deb","url":"https://github.com/advisories/GHSA-wv8v-v4c5-v75j","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-wv8v-v4c5-v75j","publisher":"GitHub Advisory Database","observed_at":"2026-11-01T14:29:31.527Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-32857be1562e16ded1e48e2d903a5deb"],"technology":"mcp-atlassian","known_exclusions":[],"conditions_summary":"### Summary\n\nThe `mcp-atlassian` server exposes an MCP tool (`confluence_upload_attachment` and the Jira attachment variant) that accepts an arbitrary server-side file path and opens it for upload without any path validation. When the server is deployed in HTTP transport mode (`streamable-http` or `sse`), a remote, unauthenticated attacker can supply attacker-controlled Atlassian service headers (`X-Atlassian-Confluence-Url` / `X-Atlassian-Confluence-Personal-Token`) to redirect the upload to an attacker-controlled endpoint, then pass an arbitrary `file_path` (e.g. `/etc/passwd`, `~/.env`, SSH private keys, cloud credentials) to exfiltrate any file readable by the server process. No prior account, session token, or `Authorization` header is required. The vulnerability was confirmed through both static code analysis (Phase 1) and a live Docker-based proof-of-concept (Phase 2).\n\n---\n\n### Details\n\n**Data flow (source → sink)**\n\n| Step | Location | Role |\n|------|----------|------|\n| 1 | `src/mcp_atlassian/servers/main.py:498-504` | Middleware extracts `X-Atlassian-Confluence-Url` and `X-Atlassian-Confluence-Personal-Token` from incoming HTTP request headers. |\n| 2 | `src/mcp_atlassian","public_affected_ranges":["< 0.22.0"]}],"null_published_at":"2026-11-02T10:00:37.197Z","source_updated_at":"2026-09-22T20:34:46.000Z","source_disclosed_at":"2026-09-22T20:34:45.000Z","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"}