{"id":"CVE-2026-44895","sourceIdentifier":"security-advisories@github.com","published":"2026-05-26T22:16:42.730","lastModified":"2026-07-24T11:10:00.170","vulnStatus":"Deferred","cveTags":[],"descriptions":[{"lang":"en","value":"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."},{"lang":"es","value":"GitLab MCP Server permite que un agente de IA se comunique directamente con GitLab. Antes de la versión 0.6.0, el transporte HTTP en src/transport.ts se envía sin ninguna capa de autenticación y con un comodín Access-Control-Allow-Origin: * en cada respuesta. El defecto estructural es que el servidor SSE establece un endpoint RPC con estado y capacidad de mutación que está respaldado por el GITLAB_PERSONAL_ACCESS_TOKEN del operador sin ninguna verificación de credenciales entrantes, luego se anuncia a cada contexto de navegador de origen cruzado a través del encabezado CORS comodín. La llamada a httpServer.listen(port) en la línea 97 tampoco pasa ningún argumento de host, por lo que el enlace se establece por defecto en 0.0.0.0 y expone la superficie sin autenticación en cada interfaz. Esta vulnerabilidad se corrige en la versión 0.6.0."}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"yoda-digital","product":"mcp-gitlab-server","versions":[{"version":"< 0.6.0","status":"affected"}]}]}],"metrics":{"cvssMetricV40":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","baseScore":9.2,"baseSeverity":"CRITICAL","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"LOW","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","confidentialityRequirement":"NOT_DEFINED","integrityRequirement":"NOT_DEFINED","availabilityRequirement":"NOT_DEFINED","modifiedAttackVector":"NOT_DEFINED","modifiedAttackComplexity":"NOT_DEFINED","modifiedAttackRequirements":"NOT_DEFINED","modifiedPrivilegesRequired":"NOT_DEFINED","modifiedUserInteraction":"NOT_DEFINED","modifiedVulnConfidentialityImpact":"NOT_DEFINED","modifiedVulnIntegrityImpact":"NOT_DEFINED","modifiedVulnAvailabilityImpact":"NOT_DEFINED","modifiedSubConfidentialityImpact":"NOT_DEFINED","modifiedSubIntegrityImpact":"NOT_DEFINED","modifiedSubAvailabilityImpact":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED"}}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-05-27T13:34:54.695835Z","id":"CVE-2026-44895","options":[{"exploitation":"poc"},{"automatable":"yes"},{"technicalImpact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-306"},{"lang":"en","value":"CWE-942"}]}],"references":[{"url":"https://github.com/yoda-digital/mcp-gitlab-server/security/advisories/GHSA-8jr5-6gvj-rfpf","source":"security-advisories@github.com"},{"url":"https://github.com/yoda-digital/mcp-gitlab-server/security/advisories/GHSA-8jr5-6gvj-rfpf","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}]}