CVSS 4.0
Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)
Атакува се
Време до експлоатация
Атакува се по мрежата, без особени условия, само при определена конфигурация или състояние на системата, без вход и след действие от потребителя.
- Експлоатация: няма данни за експлоатация
- Атаката не може да се автоматизира
Описание
Оригинално описание
mcp-go accepted requests on its HTTP transports without checking the Host header. StreamableHTTPServer.ServeHTTP in server/streamable_http.go and SSEServer.ServeHTTP in server/sse.go served any request arriving over a loopback connection regardless of the host it named, and the SSE transport's cross-origin default allowed any origin. A page in a browser could therefore point a name it controlled at the loopback address and reach a server listening there, invoking tools and reading resources that the server exposed on the assumption that only local software could connect. No release before 0.56.0 validated the header on either transport; 0.56.0 adds server/http_localhost.go, which rejects a loopback-bound request carrying a host that is not a loopback name, and wires it into both transports.
Засегнати продукти
- mark3labs mcp-go: преди 0.56.0
Вид слабост
История
- 27 август 2026 Публикувано
Други уязвимости в mark3labs mcp-go
Първоизточници
- https://www.cve.org/CVERecord?id=CVE-2026-81092
- https://nvd.nist.gov/vuln/detail/CVE-2026-81092
- https://github.com/mark3labs/mcp-go
- https://github.com/mark3labs/mcp-go/pull/921
- https://github.com/mark3labs/mcp-go/releases/tag/v0.56.0
- https://www.vulncheck.com/advisories/mcp-go-before-0.56.0-missing-host-header-validation-enables-dns-rebinding