CVE-2026-27896 vulnerabilities

Vulnerabilities for packages: ferretdb, jaeger, gptscript, opencost, osv-scanner, datadog-agent, github-mcp-server...

CVE-2026-27896 vulnerabilities

Vulnerabilities for packages: osv-scanner, gitlab-workhorse-ce, datadog-agent-fips, datadog-agent, github-mcp-server, ferretdb, flux-operator, gptscript, jaeger, opencost, flux-operator-fips, gitlab-workhorse-ce-fips, opencost-fips, jaeger-fips...

CVE-2026-27896

The Go MCP SDK used Go's standard encoding/json.Unmarshal for JSON-RPC and MCP protocol message parsing in versions prior to 1.3.1. Go's standard library performs case-insensitive matching of JSON keys to struct field tags — a field tagged json:"method" would also match "Method", "METHOD", etc...