Missing Authentication for Critical Function Affecting openshift4/ose-coredns package, versions *


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.44% (38th percentile)

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  • Snyk IDSNYK-RHEL8-OPENSHIFT4OSECOREDNS-20122499
  • published24 Sept 2026
  • disclosed16 Sept 2026

Introduced: 16 Sep 2026

CVE-2026-86003  (opens in a new tab)
CWE-306  (opens in a new tab)

How to fix?

There is no fixed version for RHEL:8 openshift4/ose-coredns.

NVD Description

Note: Versions mentioned in the description apply only to the upstream openshift4/ose-coredns package and not the openshift4/ose-coredns package as distributed by RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

CoreDNS is a DNS server written in Go. Prior to 1.14.7, the DNS-over-HTTPS, DNS-over-HTTP/3, DNS-over-QUIC, and DNS-over-gRPC listeners in plugin/pkg/doh/doh.go, core/dnsserver/server_quic.go, and core/dnsserver/server_grpc.go call dns.Msg.Unpack without the dns.DefaultMsgAcceptFunc request policy used by UDP, TCP, and DNS-over-TLS. An unauthenticated client can send an RFC 2136 UPDATE that the proxy or forward plugin passes unchanged to an update-capable upstream. If that upstream trusts CoreDNS's source address or connection and does not require an attacker-unknown end-to-end TSIG, the request appears to originate from CoreDNS and can add, replace, or delete DNS records, redirect traffic, take over names, alter mail routing, or disrupt the writable zone. This issue is fixed in version 1.14.7.

CVSS Base Scores

version 3.1