{"cve":"CVE-2026-33489","nvd":{"published":"2026-05-05T20:16:36.627","modified":"2026-07-24T23:10:00.563","status":"Analyzed","description":"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.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","score":8.2},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","score":7.5},"cwes":["CWE-863"],"references":["https://github.com/coredns/coredns/releases/tag/v1.14.3","https://github.com/coredns/coredns/security/advisories/GHSA-h8mm-c463-wjq3","https://github.com/coredns/coredns/security/advisories/GHSA-h8mm-c463-wjq3"],"products":["coredns.io:coredns"],"source":"nvd","synced_at":"2026-10-19T22:33:55.586217763+00:00"},"epss":{"cve":"CVE-2026-33489","score":0.00404,"percentile":0.34684,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-h8mm-c463-wjq3","url":"https://osv.dev/vulnerability/GHSA-h8mm-c463-wjq3","summary":"CoreDNS' transfer stanza selection uses lexicographic compare (subzone ACL bypass)","modified":"2026-09-10T03:50:44.388084446Z","packages":[{"ecosystem":"Go","name":"github.com/coredns/coredns","purl":"pkg:golang/github.com/coredns/coredns","ranges":["<1.14.3"],"fixed":["1.14.3"]}]},{"id":"GO-2026-5417","url":"https://osv.dev/vulnerability/GO-2026-5417","summary":"CoreDNS' transfer stanza selection uses lexicographic compare (subzone ACL bypass) in github.com/coredns/coredns","modified":"2026-06-25T23:00:16.224085006Z","packages":[{"ecosystem":"Go","name":"github.com/coredns/coredns","purl":"pkg:golang/github.com/coredns/coredns","ranges":["<1.14.3"],"fixed":["1.14.3"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}