CVE-2026-26018

EUVD-2026-10043
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.
PRNG
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 61%
Affected Products (NVD)
VendorProductVersion
coredns.iocoredns
𝑥
< 1.14.2
𝑥
= Vulnerable software versions
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
Red HatRed Hat Advanced Cluster Management for Kubernetes 2.13
1782924920 ≤
𝑥
< *
ADP
Red HatRed Hat Advanced Cluster Management for Kubernetes 2.13
1782924937 ≤
𝑥
< *
ADP
Red HatRed Hat Advanced Cluster Management for Kubernetes 2.14
1780204232 ≤
𝑥
< *
ADP
Red HatRed Hat Advanced Cluster Management for Kubernetes 2.14
1780204249 ≤
𝑥
< *
ADP
Red HatRed Hat Advanced Cluster Management for Kubernetes 2.15
1774086225 ≤
𝑥
< *
ADP
Azure Linux logo
Azure Linux Releases
Azure Package
Release
coredns
Azure Linux 3.0
0:1.11.4-15.azl3
fixed
CBL-Mariner 2.0
0:1.11.1-26.cm2
fixed