CVE-2026-86003

Katalog CVE

CVSS 7.5 · High EPSS 0,44%

Kerentanan Unintended Proxy or Intermediary ('Confused Deputy'). Skor CVSS 3.1 7.5 (High) menurut github.com.

Deskripsi (NVD)

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.

Rincian

Terbit di NVD

16 September 2026

Terakhir diubah

24 September 2026

Status NVD

Awaiting Analysis

CVSS 3.1

7.5 (High), sumber github.com
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-441: Unintended Proxy or Intermediary ('Confused Deputy')

EPSS (30 hari)

0,44% peluang dieksploitasi; lebih tinggi dari 36,1% CVE lain

Produk dan versi terdampak

NVD belum mencantumkan data produk (CPE) untuk CVE ini. Produk yang terdampak biasanya disebut di deskripsi dan di advisory vendor pada daftar referensi.

Referensi dan perbaikan

• https://github.com/coredns/coredns/commit/530b0a5ff2ad68cc0421f10dd93568945cc671c9
• https://github.com/coredns/coredns/releases/tag/v1.14.7
• https://github.com/coredns/coredns/security/advisories/GHSA-9gm5-9rfh-m6vx