CVE-2026-86003

The record

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.

Affected packages

Related vulnerabilities

• CVE-2026-101907 Axios is a promise-based HTTP client for the browser and Node.js. CWE-441
• CVE-2026-101905 Axios is a promise-based HTTP client for the browser and Node.js. CWE-441
• CVE-2026-87582 Confused deputy in DataTransfer in Google Chrome prior to 153.0.8010.36 allowed a remote… CWE-441
• CVE-2026-87502 Confused deputy in Fullscreen in Google Chrome prior to 153.0.8010.36 allowed a remote… CWE-441
• CVE-2026-87453 Confused deputy in BackgroundFetch in Google Chrome prior to 153.0.8010.36 allowed a… CWE-441
• CVE-2026-87442 Confused deputy in Prerender in Google Chrome prior to 153.0.8010.36 allowed a remote… CWE-441
• CVE-2026-86600 In affected Snowflake drivers, WORKLOAD_IDENTITY authentication requests a cloud… CWE-441
• CVE-2026-84329 Confused deputy in CredentialProvider in Google Chrome on on Windows prior to… CWE-441