MEDIUM 5.9 Microsoft

CVE-2026-86003

CoreDNS DoH/DoQ/gRPC bypass UPDATE rejection enforced on UDP/TCP

Microsoft Security Update 2026-Sep: CoreDNS DoH/DoQ/gRPC bypass UPDATE rejection enforced on UDP/TCP

Affected Products

azl3 coredns 1.11.4-20 on Azure Linux 3.0
azl3 coredns 1.11.4-21 on Azure Linux 3.0

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-86003
https://nvd.nist.gov/vuln/detail/CVE-2026-86003

Published: 2026-09-08 · Source: Microsoft · Feed updated: 2026-10-31

This medium severity vulnerability with a CVSS score of 5.9 was published on 2026-09-08 via Microsoft. Affected: azl3 coredns 1.11.4-20 on Azure Linux 3.0, azl3 coredns 1.11.4-21 on Azure Linux 3.0.

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