Vulnerability Description
A Server-Side Request Forgery (SSRF) vulnerability exists in the generic HTTP source and tool components of Google mcp-toolbox versions 0.3.0 through 1.4.0. While the toolbox implements baseline input sanitization for user-controlled parameters, the underlying HTTP client (internal/sources/http/http.go) fails to safely regulate request redirection boundaries. Specifically, the client is initialized without a restrictive CheckRedirect policy hook and lacks target IP validation. An attacker or a malicious data-driven prompt can supply a crafted path parameter that triggers an open redirect or a direct destination swap on the target backend, coercing the mcp-toolbox into blindly following the redirection and making unauthorized requests to internal or arbitrary external endpoints.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Mcp Toolbox For Databases | >= 0.3.0, < 1.5.0 |
Related Weaknesses (CWE)
References
- https://github.com/googleapis/mcp-toolbox/pull/3448Issue TrackingPatch
FAQ
What is CVE-2026-14540?
CVE-2026-14540 is a vulnerability with a CVSS score of 6.1 (MEDIUM). A Server-Side Request Forgery (SSRF) vulnerability exists in the generic HTTP source and tool components of Google mcp-toolbox versions 0.3.0 through 1.4.0. While the toolbox implements baseline input...
How severe is CVE-2026-14540?
CVE-2026-14540 has been rated MEDIUM with a CVSS base score of 6.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-14540?
Check the references section above for vendor advisories and patch information. Affected products include: Google Mcp Toolbox For Databases.