Threats Tagged 'cve-2026-84303'
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Threats Tagged 'cve-2026-84303'
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CVE-2026-84303: CWE-178: Improper Handling of Case Sensitivity in grpc grpc-goCVE-2026-84303 0 gRPC-Go is the Go language implementation of gRPC. Prior to 1.83.1, the xDS RBAC HTTP filter in internal/xds/httpfilter/rbac/rbac.go does not lowercase header matcher names in normalizeHeaderMatcher even though incoming metadata keys are lowercase. A DENY policy using a mixed-case name such as X-Role or User-Agent therefore does not match and fails open, allowing requests that should be rejected. The same case mismatch permits :Scheme or Grpc-Status to evade gRFC A41 validation and prevents Host from being rewritten to :authority. This issue is fixed in version 1.83.1. Join the discussion | CVE Database V5 | 09/01/2026, 18:14:37 UTC Added: 09/01/2026, 18:22:44 UTC |
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