{"id":"CVE-2026-33489","aliases":["GHSA-h8mm-c463-wjq3","GO-2026-5417"],"url":"https://o3.security/vulnerability/CVE-2026-33489","summary":"CoreDNS transfer plugin subzone ACL bypass via lexicographic zone comparison","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.\" > \"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.","published":"2026-05-05T19:13:48.461Z","modified":"2026-08-12T03:51:42.405128486Z","cvss":null,"epss":{"score":0.00388,"percentile":0.3262,"asOf":"2026-09-17"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/coredns/coredns","fixedVersion":"1.14.3"}],"fix":null,"references":[{"type":"WEB","url":"https://github.com/coredns/coredns/releases/tag/v1.14.3"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33489.json"},{"type":"ADVISORY","url":"https://github.com/coredns/coredns/security/advisories/GHSA-h8mm-c463-wjq3"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33489"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:42.405128486Z"}}