CVE-2026-33489

{"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"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-33489", "role": "CISA Coordinator", "options": [{"Exploitation": "poc"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-05-05T19:43:02.806824Z"}}}], "references": [{"url": "https://github.com/coredns/coredns/security/advisories/GHSA-h8mm-c463-wjq3", "tags": ["exploit"]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-05T19:42:42.960Z"}}], "cna": {"title": "CoreDNS transfer plugin subzone ACL bypass via lexicographic zone comparison", "source": {"advisory": "GHSA-h8mm-c463-wjq3", "discovery": "UNKNOWN"}, "metrics": [{"cvssV4_0": {"version": "4.0", "baseScore": 8.2, "attackVector": "NETWORK", "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", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "HIGH"}}], "affected": [{"vendor": "coredns", "product": "coredns", "versions": [{"status": "affected", "version": "< 1.14.3"}]}], "references": [{"url": "https://github.com/coredns/coredns/security/advisories/GHSA-h8mm-c463-wjq3", "name": "https://github.com/coredns/coredns/security/advisories/GHSA-h8mm-c463-wjq3", "tags": ["x_refsource_CONFIRM"]}, {"url": "https://github.com/coredns/coredns/releases/tag/v1.14.3", "name": "https://github.com/coredns/coredns/releases/tag/v1.14.3", "tags": ["x_refsource_MISC"]}], "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."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-863", "description": "CWE-863: Incorrect Authorization"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-05-05T19:13:48.461Z"}}}, "cveMetadata": {"cveId": "CVE-2026-33489", "state": "PUBLISHED", "dateUpdated": "2026-05-05T19:43:06.361Z", "dateReserved": "2026-03-20T16:16:48.971Z", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "datePublished": "2026-05-05T19:13:48.461Z", "assignerShortName": "GitHub_M"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"product": "coredns", "vendor": "coredns", "versions": [{"status": "affected", "version": "< 1.14.3"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:coredns.io:coredns:*:*:*:*:*:*:*:*", "matchCriteriaId": "0B1F8FE2-314C-4C38-9F18-099ACCFF0AAD", "versionEndExcluding": "1.14.3", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "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."}, {"lang": "es", "value": "CoreDNS es un servidor DNS que encadena plugins. En versiones anteriores a la 1.14.3, el plugin de transferencia puede seleccionar la cl\u00e1usula ACL incorrecta cuando se configuran tanto una zona padre como una subzona m\u00e1s espec\u00edfica. La funci\u00f3n longestMatch() en plugin/transfer/transfer.go utiliza una comparaci\u00f3n de cadenas lexicogr\u00e1fica en lugar de una coincidencia de sufijo m\u00e1s largo real para seleccionar la zona ganadora. Como resultado, una regla de transferencia de zona padre permisiva puede anular una regla de subzona restrictiva dependiendo del orden de los nombres de zona (p. ej., 'example.org.' > 'a.example.org.' lexicogr\u00e1ficamente). Esto permite a un cliente remoto no autorizado realizar AXFR/IXFR para la subzona y recuperar el contenido completo de su zona. Este problema ha sido solucionado en la versi\u00f3n 1.14.3."}], "id": "CVE-2026-33489", "lastModified": "2026-07-24T23:10:00.563", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 8.2, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-33489", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-05-05T19:43:02.806824Z", "version": "2.0.3"}}]}, "published": "2026-05-05T20:16:36.627", "references": [{"source": "security-advisories@github.com", "tags": ["Release Notes"], "url": "https://github.com/coredns/coredns/releases/tag/v1.14.3"}, {"source": "security-advisories@github.com", "tags": ["Exploit", "Vendor Advisory"], "url": "https://github.com/coredns/coredns/security/advisories/GHSA-h8mm-c463-wjq3"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Vendor Advisory"], "url": "https://github.com/coredns/coredns/security/advisories/GHSA-h8mm-c463-wjq3"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-863"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"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"]}