{"id":"CVE-2026-27831","state":"PUBLISHED","title":"rldns Vulnerable to Heap-based Out-of-Bounds Read","description":"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.","publishedAt":"2026-02-26T00:11:45.608Z","updatedAt":"2026-02-27T15:24:12.727Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["bluedragonsecurity rldns"],"affected":[{"vendor":"bluedragonsecurity","product":"rldns","versions":[{"version":"= 1.3","status":"affected"}]}],"references":["https://github.com/bluedragonsecurity/rldns/security/advisories/GHSA-fv38-45j4-g9x4","https://github.com/bluedragonsecurity/rldns-1.3-heap-out-of-bounds-vulnerability-fixed-in-rldns-1.4","https://github.com/bluedragonsecurity/rldns_archives/blob/main/diff/rldns-1.4.diff","https://medium.com/@w1sdom/heap-based-buffer-over-read-vulnerability-in-rldns-1-3-5da3bccdc031"],"weaknesses":["CWE-125"],"ingestedAt":"2026-10-29T20:11:31.369Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/27xxx/CVE-2026-27831.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-27831","state":"PUBLISHED","datePublished":"2026-02-26T00:11:45.608Z","dateUpdated":"2026-02-27T15:24:12.727Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-02-24T02:32:39.800Z"},"containers":{"cna":{"title":"rldns Vulnerable to Heap-based Out-of-Bounds Read","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."}],"affected":[{"vendor":"bluedragonsecurity","product":"rldns","versions":[{"version":"= 1.3","status":"affected"}]}],"references":[{"url":"https://github.com/bluedragonsecurity/rldns/security/advisories/GHSA-fv38-45j4-g9x4","name":"https://github.com/bluedragonsecurity/rldns/security/advisories/GHSA-fv38-45j4-g9x4","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/bluedragonsecurity/rldns-1.3-heap-out-of-bounds-vulnerability-fixed-in-rldns-1.4","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_archives/blob/main/diff/rldns-1.4.diff","name":"https://github.com/bluedragonsecurity/rldns_archives/blob/main/diff/rldns-1.4.diff","tags":["x_refsource_MISC"]},{"url":"https://medium.com/@w1sdom/heap-based-buffer-over-read-vulnerability-in-rldns-1-3-5da3bccdc031","name":"https://medium.com/@w1sdom/heap-based-buffer-over-read-vulnerability-in-rldns-1-3-5da3bccdc031","tags":["x_refsource_MISC"]}],"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"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-125","lang":"en","description":"CWE-125: Out-of-bounds Read","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-02-27T15:24:12.727Z"},"source":{"advisory":"GHSA-fv38-45j4-g9x4","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","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"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-02-26T15:14:48.813Z"}}]}}}