Security vulnerabilities and automated fixes for case sensitivity issues
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A high-severity vulnerability (CVE-2026-27896) in the Model Context Protocol Go SDK v1.3.0 allowed attackers to bypass security controls through improper handling of case sensitivity. The fix upgrades the dependency from v1.3.0 to v1.3.1, which correctly normalizes case comparisons. This vulnerability was particularly concerning for CLI tools where attackers could manipulate input to evade validation logic.