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Microsoft Security Response CenterCVE-2026-84303

gRPC-Go: xDS RBAC HTTP Filter bypass via mixed-case Header Matching and gRFC A41 validation evasion

Medium 1 CVE Published Sep 7, 2026 at 1:59 AM UTC

Summary

Mariner

Products covered

  • azl3 grpc 1.62.3-1 on Azure Linux 3.0

Remediation

See the Microsoft Security Update Guide for the update that applies to your product.

CVEs in this advisory 1

Updates

  1. Published by Microsoft Security Response Center

    The publication date reported by the vendor.

  2. Updated by Microsoft Security Response Center

    The vendor changed the advisory after it was first published.

  3. Added to SecurityAlert

    We collected the advisory from the official source.

  4. Confirmed at the source

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