third_party/libwebm/METADATA

third_party {
  security {
    # This CVE has an overly broad 'Known Affected' list. The issue was fixed
    # in libwebm-1.0.0.27-334-g8e88e04. The affected code is not included in
    # libwebm or Chrome.
    mitigated_security_patch: "CVE-2018-6406"
  }
}