CVE-2026-33252 is a cross-site request forgery (CSRF) vulnerability in the Go MCP SDK prior to version 1.4.1. This High severity (CVSS 7.1) flaw allows an arbitrary website to send malicious MCP requests to a local server without proper origin validation or Content-Type enforcement. Requiring user interaction, successful exploitation in deployments without authorization could lead to high integrity and low availability impacts, potentially triggering unauthorized tool execution. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 1.4.1CPE matchmatch criteria | cpe:2.3:a:lfprojects:mcp_go_sdk:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:L
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.