CVE-2026-26018

CVE-2026-26018 · CoreDNS Loop Detection Denial of Service Vulnerability

This page contains facts from public vulnerability sources. Check the original advisory before updating.

CoreDNS is a DNS server that chains plugins. Prior to version 1.14.2, a denial of service vulnerability exists in CoreDNS's loop detection plugin that allows an attacker to crash the DNS server by sending specially crafted DNS queries. The vulnerability stems from the use of a predictable pseudo-random number generator (PRNG) for generating a secret query name, combined with a fatal error handler that terminates the entire process. This issue has been patched in version 1.14.2.

CVSS 7.5 · High · EPSS 0.8%

Published

2026-03-06T15:35:50.801Z

Updated

2026-07-15T01:15:33.876Z

Stack: network

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