PT-2026-118090

CoreDNS k8s external headless AXFR can emit an empty transfer batch that panics the transfer plugin in github.com/coredns/coredns...

GHSA-74W3-63XV-X9MV CoreDNS `k8s_external` headless AXFR can emit an empty transfer batch that panics the `transfer` plugin

Summary A network DNS client allowed to request AXFR for a CoreDNS zone can trigger a panic when CoreDNS is configured with k8sexternal headless-service zone transfers and Kubernetes contains a headless service endpoint with no declared ports. The built-in k8sexternal transferer can emit an empty...

CoreDNS `k8s_external` headless AXFR can emit an empty transfer batch that panics the `transfer` plugin

Summary A network DNS client allowed to request AXFR for a CoreDNS zone can trigger a panic when CoreDNS is configured with k8sexternal headless-service zone transfers and Kubernetes contains a headless service endpoint with no declared ports. The built-in k8sexternal transferer can emit an empty...

K000163143: Multiple CoreDNS vulnerabilities CVE-2026-35579, CVE-2026-33489, CVE-2026-33190, CVE-2026-32934, CVE-2026-32936

Security Advisory Description CVE-2026-35579 CoreDNS is a DNS server written in Go. In versions prior to 1.14.3, the gRPC, QUIC, DoH, and DoH3 transport implementations incorrectly handle TSIG authentication. For gRPC and QUIC, the server checks whether the TSIG key name exists in the configurati...

CoreDNS DNS Server Unauthenticated Access

The vulnerability of the longestMatch function in the plugin/transfer/transfer.go file of the CoredNS DNS server is related to deficiencies in the authentication mechanism. Exploiting this vulnerability could allow a malicious actor to gain unauthorized access to protected information...

CoreDNS `k8s_external` headless AXFR can emit an empty transfer batch that panics the `transfer` plugin

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Uncaught Exception

Overview Affected versions of this package are vulnerable to Uncaught Exception in the transfer. An attacker can cause a panic and disrupt DNS service availability by sending an AXFR request to a zone configured with k8sexternal headless-service zone transfers when a headless service endpoint...

CVE-2026-62994 CoreDNS `k8s_external` headless AXFR can emit an empty transfer batch that panics the `transfer` plugin

CoreDNS is a DNS server written in Go. From 1.9.4 until 1.14.5, a network DNS client allowed to request AXFR for a CoreDNS zone can trigger a panic when CoreDNS is configured with k8sexternal headless-service zone transfers and Kubernetes contains a headless service endpoint with no declared port...

CVE-2026-33489

A flaw was found in CoreDNS. An unauthorized remote client can exploit a vulnerability in the transfer plugin's Access Control List ACL stanza selection. This occurs when both a parent zone and a more-specific subzone are configured, and the longestMatch function incorrectly uses a lexicographic...

CoreDNS transfer plugin subzone ACL bypass via lexicographic zone comparison

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CVE-2026-33489

CoreDNS is a DNS server that chains plugins. In versions prior to 1.14.3, the transfer plugin can select the wrong ACL stanza when both a parent zone and a more-specific subzone are configured. The longestMatch function in plugin/transfer/transfer.go uses a lexicographic string comparison instead...

AZL-85721 CVE-2026-33489 affecting package coredns for versions less than 1.11.4-17

CoreDNS is a DNS server that chains plugins. In versions prior to 1.14.3, the transfer plugin can select the wrong ACL stanza when both a parent zone and a more-specific subzone are configured. The longestMatch function in plugin/transfer/transfer.go uses a lexicographic string comparison instead...

CVE-2026-33489 CoreDNS transfer plugin subzone ACL bypass via lexicographic zone comparison

CoreDNS is a DNS server that chains plugins. In versions prior to 1.14.3, the transfer plugin can select the wrong ACL stanza when both a parent zone and a more-specific subzone are configured. The longestMatch function in plugin/transfer/transfer.go uses a lexicographic string comparison instead...

EUVD-2026-27450

CoreDNS is a DNS server that chains plugins. In versions prior to 1.14.3, the transfer plugin can select the wrong ACL stanza when both a parent zone and a more-specific subzone are configured. The longestMatch function in plugin/transfer/transfer.go uses a lexicographic string comparison instead...

CVE-2026-33489

CoreDNS CVE-2026-33489 affects the transfer plugin prior to version 1.14.3. The root cause is a lexicographic longestMatch() comparison in plugin/transfer/transfer.go, which can select a permissive parent-zone ACL over a more-specific subzone ACL when both are configured. This flaw enables an una...

CVE-2026-33489 CoreDNS transfer plugin subzone ACL bypass via lexicographic zone comparison

CoreDNS is a DNS server that chains plugins. In versions prior to 1.14.3, the transfer plugin can select the wrong ACL stanza when both a parent zone and a more-specific subzone are configured. The longestMatch function in plugin/transfer/transfer.go uses a lexicographic string comparison instead...

CVE-2026-33489

CoreDNS is a DNS server that chains plugins. In versions prior to 1.14.3, the transfer plugin can select the wrong ACL stanza when both a parent zone and a more-specific subzone are configured. The longestMatch function in plugin/transfer/transfer.go uses a lexicographic string comparison instead...

CVE-2026-33489

CoreDNS is a DNS server that chains plugins. In versions prior to 1.14.3, the transfer plugin can select the wrong ACL stanza when both a parent zone and a more-specific subzone are configured. The longestMatch function in plugin/transfer/transfer.go uses a lexicographic string comparison instead...

CVE-2026-33489: Incorrect Authorization

CoreDNS is a DNS server that chains plugins. In versions prior to 1.14.3, the transfer plugin can select the wrong ACL stanza when both a parent zone and a more-specific subzone are configured. The longestMatch function in plugin/transfer/transfer.go uses a lexicographic string comparison instead...

CoreDNS security vulnerabilities

CoreDNS is a DNS server within the CoreDNS community. Versions of CoreDNS prior to 1.14.3 contained a security vulnerability. This vulnerability stemmed from an error in the selection of ACL rules in the transfer plugin, which could allow unauthorized remote clients to execute AXFR/IXFR and...