{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-27831", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-02-24T02:32:39.800Z", "datePublished": "2026-02-26T00:11:45.608Z", "dateUpdated": "2026-02-27T15:24:12.727Z"}, "containers": {"cna": {"title": "rldns Vulnerable to Heap-based Out-of-Bounds Read", "problemTypes": [{"descriptions": [{"cweId": "CWE-125", "lang": "en", "description": "CWE-125: Out-of-bounds Read", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}}], "references": [{"name": "https://github.com/bluedragonsecurity/rldns/security/advisories/GHSA-fv38-45j4-g9x4", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/bluedragonsecurity/rldns/security/advisories/GHSA-fv38-45j4-g9x4"}, {"name": "https://github.com/bluedragonsecurity/rldns-1.3-heap-out-of-bounds-vulnerability-fixed-in-rldns-1.4", "tags": ["x_refsource_MISC"], "url": "https://github.com/bluedragonsecurity/rldns-1.3-heap-out-of-bounds-vulnerability-fixed-in-rldns-1.4"}, {"name": "https://github.com/bluedragonsecurity/rldns_archives/blob/main/diff/rldns-1.4.diff", "tags": ["x_refsource_MISC"], "url": "https://github.com/bluedragonsecurity/rldns_archives/blob/main/diff/rldns-1.4.diff"}, {"name": "https://medium.com/@w1sdom/heap-based-buffer-over-read-vulnerability-in-rldns-1-3-5da3bccdc031", "tags": ["x_refsource_MISC"], "url": "https://medium.com/@w1sdom/heap-based-buffer-over-read-vulnerability-in-rldns-1-3-5da3bccdc031"}], "affected": [{"vendor": "bluedragonsecurity", "product": "rldns", "versions": [{"version": "= 1.3", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-02-27T15:24:12.727Z"}, "descriptions": [{"lang": "en", "value": "rldns is an open source DNS server. Version 1.3 has a heap-based out-of-bounds read that leads to denial of service. Version 1.4 contains a patch for the issue."}], "source": {"advisory": "GHSA-fv38-45j4-g9x4", "discovery": "UNKNOWN"}}, "adp": [{"references": [{"url": "https://github.com/bluedragonsecurity/rldns/security/advisories/GHSA-fv38-45j4-g9x4", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-02-26T15:14:43.983653Z", "id": "CVE-2026-27831", "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": "2026-02-26T15:14:48.813Z"}}]}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "rldns is an open source DNS server. Version 1.3 has a heap-based out-of-bounds read that leads to denial of service. Version 1.4 contains a patch for the issue."}], "id": "CVE-2026-27831", "lastModified": "2026-02-27T16:16:24.617", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-02-26T01:16:24.770", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/bluedragonsecurity/rldns-1.3-heap-out-of-bounds-vulnerability-fixed-in-rldns-1.4"}, {"source": "security-advisories@github.com", "url": "https://github.com/bluedragonsecurity/rldns/security/advisories/GHSA-fv38-45j4-g9x4"}, {"source": "security-advisories@github.com", "url": "https://github.com/bluedragonsecurity/rldns_archives/blob/main/diff/rldns-1.4.diff"}, {"source": "security-advisories@github.com", "url": "https://medium.com/@w1sdom/heap-based-buffer-over-read-vulnerability-in-rldns-1-3-5da3bccdc031"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/bluedragonsecurity/rldns/security/advisories/GHSA-fv38-45j4-g9x4"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[1.3,1.3]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "rldns", "source": "cna", "vendor": "bluedragonsecurity"}, "product": "rldns", "vendor": "bluedragonsecurity"}], "created": "2026-02-26T13:10:23.840063+00:00", "updated": "2026-02-26T13:10:23.840192+00:00", "vendors": ["bluedragonsecurity", "bluedragonsecurity$PRODUCT$rldns"]}