CVE-2026-33252
7.1 · HIGHOverview
CVE-2026-33252 is a high-severity vulnerability affecting lfprojects mcp_go_sdk. It was published on March 24, 2026 and has a CVSS 3.1 base score of 7.1 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
The Go MCP SDK used Go's standard encoding/json. Prior to version 1.4.1, the Go SDK's Streamable HTTP transport accepted browser-generated cross-site `POST` requests without validating the `Origin` header and without requiring `Content-Type: application/json`. In deployments without Authorization, especially stateless or sessionless configurations, this allows an arbitrary website to send MCP requests to a local server and potentially trigger tool execution. Version 1.4.1 contains a patch for the issue.
Remediation
Check the references section for vendor advisories and patches from lfprojects. Update mcp_go_sdk to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| lfprojects | mcp_go_sdk | >= 0, < 1.4.1 | Affected |
Frequently Asked Questions
What is CVE-2026-33252?
CVE-2026-33252 is a high-severity vulnerability affecting lfprojects mcp_go_sdk. It was published on March 24, 2026 and has a CVSS 3.1 base score of 7.1 (HIGH).
How severe is CVE-2026-33252?
This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2026-33252?
Check the references section for vendor advisories and patches from lfprojects. Update mcp_go_sdk to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2026-33252?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-33252 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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