CVE-2026-84303

CVE-2026-84303 affects gRPC-Go (the Go implementation of gRPC). The xDS RBAC HTTP filter (internal/xds/httpfilter/rbac/rbac.go) fails to lowercase header matcher names in normalizeHeaderMatcher, while incoming metadata keys are already lowercase. A DENY policy using a mixed-case name (e.g., X-Rol...