34 matches found
CVE-2026-34227
Unauthenticated MCP Interface + CORS Bypass Sliver's MCP server spins up an unauthenticated SSE interface and fires back Access-Control-Allow-Origin: on every response. The mcp-go library doesn't validate Content-Type, so Simple Requests text/plain skip the browser's preflight check entirely. No...
CVE-2026-108859
A flaw was found in mcp-go. The HTTP server implementation does not restrict the size of incoming HTTP POST request bodies before buffering them into memory. A remote, unauthenticated attacker can exploit this vulnerability by sending excessively large or multiple concurrent requests, causing...
CVE-2026-108859
mcp-go through 1.2.1 contains a denial of service vulnerability in StreamableHTTPServer.ServeHTTP that allows remote unauthenticated attackers to exhaust memory by sending oversized POST bodies. Attackers can send arbitrarily large or many concurrent POST requests, read fully via io.ReadAll befor...
EUVD-2026-97010
mcp-go through 1.2.1 contains a denial of service vulnerability in StreamableHTTPServer.ServeHTTP that allows remote unauthenticated attackers to exhaust memory by sending oversized POST bodies. Attackers can send arbitrarily large or many concurrent POST requests, read fully via io.ReadAll befor...
CVE-2026-108859 mcp-go through 1.2.1 Denial of Service via Unbounded POST Body Buffering
mcp-go through 1.2.1 contains a denial of service vulnerability in StreamableHTTPServer.ServeHTTP that allows remote unauthenticated attackers to exhaust memory by sending oversized POST bodies. Attackers can send arbitrarily large or many concurrent POST requests, read fully via io.ReadAll befor...
CVE-2026-108859
The mcp-go library (versions through 1.2.1 ) is vulnerable to a Denial of Service (DoS) attack within the StreamableHTTPServer.ServeHTTP component. The root cause is unbounded POST body buffering , where the application uses io.ReadAll to read request bodies fully before performing any validation...
CVE-2026-108859 mcp-go through 1.2.1 Denial of Service via Unbounded POST Body Buffering
mcp-go through 1.2.1 contains a denial of service vulnerability in StreamableHTTPServer.ServeHTTP that allows remote unauthenticated attackers to exhaust memory by sending oversized POST bodies. Attackers can send arbitrarily large or many concurrent POST requests, read fully via io.ReadAll befor...
CVE-2026-108859: Allocation of Resources Without Limits or Throttling
mcp-go through 1.2.1 contains a denial of service vulnerability in StreamableHTTPServer.ServeHTTP that allows remote unauthenticated attackers to exhaust memory by sending oversized POST bodies. Attackers can send arbitrarily large or many concurrent POST requests, read fully via io.ReadAll befor...
PT-2026-110178
Name of the Vulnerable Software and Affected Versions mcp-go versions prior to 1.2.2 Description A denial of service issue exists in the StreamableHTTPServer.ServeHTTP function. Remote unauthenticated attackers can exhaust system memory by sending oversized POST bodies. This occurs because the...
openSUSE 16: mcphost / mcphost-bash-completion / mcphost-fish-completion / etc (openSUSE-SU-2026:21771-1)
The remote openSUSE 16 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:21771-1 advisory. - CVE-2026-41178: go.opentelemetry.io/otel/baggage: no rejection of raw-length headers in baggage parsing allows for DoS via oversized inputs...
OPENSUSE-SU-2026:21771-1 Security update for mcphost
This update for mcphost fixes the following issues: - CVE-2026-41178: go.opentelemetry.io/otel/baggage: no rejection of raw-length headers in baggage parsing allows for DoS via oversized inputs bsc1276612. - CVE-2026-81092: github.com/mark3labs/mcp-go/server: requests accepted in HTTP transports...
SUSE-SU-2026:23496-1 Security update for mcphost
This update for mcphost fixes the following issues: - CVE-2026-41178: go.opentelemetry.io/otel/baggage: no rejection of raw-length headers in baggage parsing allows for DoS via oversized inputs bsc1276612. - CVE-2026-81092: github.com/mark3labs/mcp-go/server: requests accepted in HTTP transports...
SUSE-SU-2026:23636-1 Security update for mcphost
This update for mcphost fixes the following issues: - CVE-2026-41178: go.opentelemetry.io/otel/baggage: no rejection of raw-length headers in baggage parsing allows for DoS via oversized inputs bsc1276612. - CVE-2026-81092: github.com/mark3labs/mcp-go/server: requests accepted in HTTP transports...
CVE-2026-81092
A flaw was found in mcp-go. This component failed to validate the Host header in HTTP requests, specifically within its StreamableHTTPServer and SSEServer transports. A remote attacker could exploit this by using a crafted web page to perform a DNS rebinding attack. This allows the attacker to...
SUSE CVE-2026-81092
mcp-go accepted requests on its HTTP transports without checking the Host header. StreamableHTTPServer.ServeHTTP in server/streamablehttp.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...
github.com/mark3labs/mcp-go: mcp-go: DNS Rebinding vulnerability due to missing Host header validation
A flaw was found in mcp-go. This component failed to validate the Host header in HTTP requests, specifically within its StreamableHTTPServer and SSEServer transports. A remote attacker could exploit this by using a crafted web page to perform a DNS rebinding attack. This allows the attacker to...
github.com/mark3labs/mcp-go: mcp-go: DNS Rebinding vulnerability due to missing Host header validation
A flaw was found in mcp-go. This component failed to validate the Host header in HTTP requests, specifically within its StreamableHTTPServer and SSEServer transports. A remote attacker could exploit this by using a crafted web page to perform a DNS rebinding attack. This allows the attacker to...
CVE-2026-81092
mcp-go accepted requests on its HTTP transports without checking the Host header. StreamableHTTPServer.ServeHTTP in server/streamablehttp.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...
EUVD-2026-67147
mcp-go accepted requests on its HTTP transports without checking the Host header. StreamableHTTPServer.ServeHTTP in server/streamablehttp.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...
CVE-2026-81092 mcp-go before 0.56.0 Missing Host Header Validation Enables DNS Rebinding
mcp-go accepted requests on its HTTP transports without checking the Host header. StreamableHTTPServer.ServeHTTP in server/streamablehttp.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...