CVE-2026-108859: mcp-go 0 through 1.2.1

Affected technology

mcp-go · 0 through 1.2.1
mark3labs

Description’s affected range: through 1.2.1

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 4.0): Network (remote) · No privileges required · No user interaction required

What an attacker can do

Remote unauthenticated attackers can exhaust memory by sending oversized POST bodies. Vendor/CNA’s CVSS 4.0 assessment (base score 8.7/10) rates confidentiality and integrity impact as none; availability impact as high.