CVE-2026-27831 HIGH

CVE-2026-27831: rldns Vulnerable to Heap-based Out-of-Bounds Read

Vendor Bluedragonsecurity
Product rldns
Weakness CWE-125
Published February 26, 2026
Last update February 27, 2026
View on NVD All CVEs

CVSS base score

7.5/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

February 26, 2026 CVE published
February 27, 2026 Record updated