{"items":[{"id":"NVI-00020097","kind":"vulnerability","title":"@zereight/mcp-gitlab: DNS rebinding reaches local Streamable HTTP MCP transport","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-vmp7-252j-cwp7","CVE-2026-61568"],"plain_summary":"GitHub lists this reviewed advisory for @zereight/mcp-gitlab. 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-7530bae7717bf60a956ff22a3dec96da"],"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":"2026-09-15T20:54:56.000Z","value":"9.6 critical","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-7530bae7717bf60a956ff22a3dec96da"}],"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-7530bae7717bf60a956ff22a3dec96da","url":"https://github.com/advisories/GHSA-vmp7-252j-cwp7","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-vmp7-252j-cwp7","publisher":"GitHub Advisory Database","observed_at":"2026-11-01T19:09:30.244Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-7530bae7717bf60a956ff22a3dec96da"],"technology":"@zereight/mcp-gitlab","known_exclusions":[],"conditions_summary":"`@zereight/mcp-gitlab` exposes its Streamable HTTP MCP endpoint without an effective Host or Origin allowlist. A malicious web page can use DNS rebinding to route browser requests to a victim's local MCP listener while preserving an attacker-controlled `Host` and `Origin`. The server accepts those headers and reaches the MCP initialization path instead of rejecting the request at the HTTP boundary.\n\nThis is CWE-350, Reliance on Reverse DNS Resolution for a Security-Critical Action. The affected package is `@zereight/mcp-gitlab` version `2.1.18` at commit `74a8c834424ff557ad8bc6f225e4dc5acf80aa13`.\n\nThe vulnerable transport setup is in `index.ts`. Express JSON parsing is installed globally before any MCP route-level Host or Origin allowlist:\n\n```typescript\n// index.ts:12077\napp.use(express.json());\n\nregisterDownloadProxy(app);\n```\n\nThe Streamable HTTP transport is then created without the SDK DNS-rebinding controls:\n\n```typescript\n// index.ts:12375\ntransport = new StreamableHTTPServerTransport({\n  sessionIdGenerator: () => randomUUID(),\n  onsessioninitialized: (newSessionId: string) => {\n    streamableTransports[newSessionId] = transport;\n    metrics.totalSessions++;\n    metrics.act","public_affected_ranges":["< 2.1.30"]}],"null_published_at":"2026-11-08T15:11:49.349Z","source_updated_at":"2026-09-15T20:54:56.000Z","source_disclosed_at":"2026-09-15T20:54:55.000Z","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":"2026-11-01T19:09:30.244Z"}],"next_cursor":null,"snapshot_revision":"42594"}