Mark3labs vulnerabilities

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Published CVEs affecting Mark3labs products: 1 record(s), with severity, exploitation and fixes.

Exploited only (KEV) →

CVE-2026-108859 High · 7.5 CWE-770 Oct 11, 2026

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 before validation, to degrade or OOM-kill the server process.