What is CVE-2026-26018?

CVE-2026-26018 is a high-severity vulnerability in Coredns, classified under CWE-337. CVSS score: 7.5/10. Published 2026-03-06.

How severe is CVE-2026-26018?

High severity. CVSS v3 base score is 7.5 out of 10.

Resource exhaustion in Coredns

CVE-2026-26018

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…

EPSS: 0.000 (7.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Coredns — versions < 1.14.2

Weakness classification (CWE)

CWE-337
CWE-770 — Allocation of Resources Without Limits or Throttling
CWE-400 — Uncontrolled Resource Consumption

References

https://github.com/coredns/coredns/security/advisories/GHSA-h75p-j8xm-m278 (x_refsource_CONFIRM)
https://github.com/coredns/coredns/releases/tag/v1.14.2 (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-26018?: CVE-2026-26018 is a high-severity vulnerability in Coredns, classified under CWE-337. CVSS score: 7.5/10. Published 2026-03-06.
How severe is CVE-2026-26018?: High severity. CVSS v3 base score is 7.5 out of 10.