CVE-2026-27896 vulnerabilities

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

CVE-2026-27896 vulnerabilities

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