High severity7.5NVD Advisory· Published Nov 8, 2026

CVE-2026-123577

Description

Hickory DNS from 0.24.0 before 0.26.2 contains a resource exhaustion vulnerability that allows remote attackers to consume server memory via unbounded DoH request bodies. Attackers can send large request bodies over HTTP/2 or HTTP/3 to a DNS over HTTP server, causing memory exhaustion and denial of service.

Affected products

Hickory DNS/Hickory DNSllm-fuzzy
Range: <0.26.2

Patches

Vulnerability mechanics

References

github.com/hickory-dns/hickory-dns/security/advisories/GHSA-5r56-v84h-c3w5nvd
www.vulncheck.com/advisories/hickory-dns-0.24.0-before-0.26.2-doh-unbounded-request-body-denial-of-servicenvd

News mentions

No linked articles in our index yet.

cvss	0.488
epss	0.000
exploit	0.000
kev	0.000
patch	-0.070
ransomware	0.000