{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-33489", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-03-20T16:16:48.971Z", "datePublished": "2026-05-05T19:13:48.461Z", "dateUpdated": "2026-05-05T19:43:06.361Z"}, "containers": {"cna": {"title": "CoreDNS transfer plugin subzone ACL bypass via lexicographic zone comparison", "problemTypes": [{"descriptions": [{"cweId": "CWE-863", "lang": "en", "description": "CWE-863: Incorrect Authorization", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 8.2, "baseSeverity": "HIGH", "vectorString": "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", "version": "4.0"}}], "references": [{"name": "https://github.com/coredns/coredns/security/advisories/GHSA-h8mm-c463-wjq3", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/coredns/coredns/security/advisories/GHSA-h8mm-c463-wjq3"}, {"name": "https://github.com/coredns/coredns/releases/tag/v1.14.3", "tags": ["x_refsource_MISC"], "url": "https://github.com/coredns/coredns/releases/tag/v1.14.3"}], "affected": [{"vendor": "coredns", "product": "coredns", "versions": [{"version": "< 1.14.3", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-05-05T19:13:48.461Z"}, "descriptions": [{"lang": "en", "value": "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."}], "source": {"advisory": "GHSA-h8mm-c463-wjq3", "discovery": "UNKNOWN"}}, "adp": [{"references": [{"url": "https://github.com/coredns/coredns/security/advisories/GHSA-h8mm-c463-wjq3", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-05-05T19:43:02.806824Z", "id": "CVE-2026-33489", "options": [{"Exploitation": "poc"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-05T19:43:06.361Z"}}]}}

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{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.14.3)"}}], "enrichment": {"confidence": 91.0, "confidence_source": "matching", "scores": [{"score": 91.0, "source": "matching"}]}, "original": {"product": "coredns", "source": "cna", "vendor": "coredns"}, "product": "coredns", "vendor": "coredns.io"}], "created": "2026-05-05T20:30:31.731829+00:00", "updated": "2026-05-05T21:30:05.510778+00:00", "vendors": ["coredns.io", "coredns.io$PRODUCT$coredns"]}