{"id":"CVE-2026-27831","aliases":["EUVD-2026-8787"],"status":"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.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00494,"percentile":0.42916,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-125"],"published":"2026-02-26T00:11:45Z","modified":"2026-06-17T10:27:45Z","exploits":[{"source":"pocgithub","id":"bluedragonsecurity/CVE-2026-27831-POC","title":"bluedragonsecurity/CVE-2026-27831-POC","date":"2026-02-26","url":"https://github.com/bluedragonsecurity/CVE-2026-27831-POC"}],"products":[{"vendor":"bluedragonsecurity","product":"rldns"}],"references":[{"url":"https://github.com/bluedragonsecurity/rldns/security/advisories/GHSA-fv38-45j4-g9x4","tags":["x_refsource_CONFIRM","exploit"]},{"url":"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","tags":["x_refsource_MISC"]},{"url":"https://medium.com/@w1sdom/heap-based-buffer-over-read-vulnerability-in-rldns-1-3-5da3bccdc031","tags":["x_refsource_MISC"]}],"sources":{"cve":[{"id":"CVE-2026-27831","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.","status":"published","published":"2026-02-26T00:11:45.608Z","modified":"2026-02-27T15:24:12.727Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:19:48.826324Z"}],"euvd":[{"id":"EUVD-2026-8787","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.","status":"published","published":"2026-02-26T00:11:45Z","modified":"2026-02-27T15:24:12Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T19:48:14.049749Z"}],"nvd":[{"id":"CVE-2026-27831","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.","status":"published","published":"2026-02-26T01:16:24.77Z","modified":"2026-06-17T10:27:45.46Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:12:07.027269Z"}]}}