CVE-2026-26018
HIGHCoreDNS < 1.14.2 - Denial of Service via Predictable PRNG in Loop Detection Plugin
Title source: llmDescription
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.
References (2)
Core 2
Core References
Vendor Advisory x_refsource_confirm
https://github.com/coredns/coredns/security/advisories/GHSA-h75p-j8xm-m278
Release Notes x_refsource_misc
https://github.com/coredns/coredns/releases/tag/v1.14.2
Scores
CVSS v3
7.5
EPSS
0.0079
EPSS Percentile
51.4%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-400
CWE-337
CWE-770
Status
published
Products (2)
coredns/coredns
0 - 1.14.2Go
coredns.io/coredns
< 1.14.2
Published
Mar 06, 2026
Tracked Since
Mar 06, 2026