The vulnerability of the longestMatch() function in the plugin/transfer/transfer.go file of the CoredNS DNS server allows a hacker to gain unauthorized access to protected information.

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...

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...