What is CVE-2026-32936?

CVE-2026-32936 is a high-severity vulnerability in Coredns, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2026-05-05.

How severe is CVE-2026-32936?

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

Resource exhaustion in Coredns

CVE-2026-32936

CoreDNS is a DNS server that chains plugins. In versions prior to 1.14.3, the DNS-over-HTTPS (DoH) GET path accepts oversized dns= query parameter values and performs URL query parsing, base64 decoding, and DNS message unpacking before rej…

Vulnerability class: DoS (Denial of Service)

EPSS: 0.000 (12.1th 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 < 1.14.3
Coredns.io Coredns

Weakness classification (CWE)

CWE-400 — Uncontrolled Resource Consumption

References

https://github.com/coredns/coredns/security/advisories/GHSA-63cw-r7xf-jmwr (x_refsource_CONFIRM, Exploit, Mitigation, Vendor Advisory)
https://github.com/coredns/coredns/releases/tag/v1.14.3 (x_refsource_MISC, Release Notes)

Frequently asked questions

What is CVE-2026-32936?: CVE-2026-32936 is a high-severity vulnerability in Coredns, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2026-05-05.
How severe is CVE-2026-32936?: High severity. CVSS v3 base score is 7.5 out of 10.