Unintended Proxy or Intermediary ('Confused Deputy') Affecting eks-distro-1.33-coredns-fips-1.14.2 package, versions *


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.44% (38th percentile)

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  • Snyk IDSNYK-MINIMOSLATEST-EKSDISTRO133COREDNSFIPS1142-19924276
  • published19 Sept 2026
  • disclosed16 Sept 2026

Introduced: 16 Sep 2026

NewCVE-2026-86003  (opens in a new tab)
CWE-441  (opens in a new tab)

How to fix?

There is no fixed version for Minimos:latest eks-distro-1.33-coredns-fips-1.14.2.

NVD Description

Note: Versions mentioned in the description apply only to the upstream eks-distro-1.33-coredns-fips-1.14.2 package and not the eks-distro-1.33-coredns-fips-1.14.2 package as distributed by Minimos. See How to fix? for Minimos:latest 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