{"id":"AZL-85721","summary":"CVE-2026-33489 affecting package coredns for versions less than 1.11.4-17","details":"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 of an actual longest-suffix match to select the winning zone. As a result, a permissive parent-zone transfer rule can override a restrictive subzone rule depending on zone name ordering (e.g., \"example.org.\" \u003e \"a.example.org.\" lexicographically). This allows an unauthorized remote client to perform AXFR/IXFR for the subzone and retrieve its full zone contents. This issue has been fixed in version 1.14.3.","modified":"2026-08-31T05:26:27Z","published":"2026-05-05T20:16:36Z","upstream":["CVE-2026-33489"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33489"}],"affected":[{"package":{"name":"coredns","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/coredns"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.11.4-17"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-85721.json"}}],"schema_version":"1.9.0"}