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Vulnerabilities CVE-2026-26018

CVE-2026-26018

High
Open
TLP:CLEAR

CoreDNS Loop Detection Denial of Service Vulnerability

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Description

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.

Details

CVSS Score
7.5
EPSS Score
1.12%

63.1th percentile

CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Confidence
90%
Published
Mar 6, 2026
Last Modified
Jul 15, 2026
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