CVE-2026-44895

CVE-2026-44895 · GitLab MCP Server: SSE transport has no authentication and wildcard CORS, exposing all GitLab tools

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GitLab MCP Server lets an AI agent talk directly to GitLab. Prior to 0.6.0, the HTTP transport in src/transport.ts ships with no authentication layer at all and a wildcard Access-Control-Allow-Origin: * on every response. The structural defect is that the SSE server stands up a stateful, mutation-capable RPC endpoint that is backed by the operator's GITLAB_PERSONAL_ACCESS_TOKEN without any inbound credential check, then advertises itself to every cross-origin browser context via the wildcard CORS header. The httpServer.listen(port) call at line 97 also passes no host argument, so the bind defaults to 0.0.0.0 and exposes the auth-less surface on every interface. This vulnerability is fixed in 0.6.0.

CVSS 9.2 · Critique · EPSS 0,4% · Correctif disponible

Publication

2026-05-26T21:08:13.107Z

Mise à jour

2026-05-27T13:35:15.941Z

Pile logicielle: node

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