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

CVE-2026-123573

Description

hickory-dns from 0.20.1 before 0.26.2 contains a denial of service vulnerability in the hickory-proto SVCB and HTTPS record presentation format parser. Attackers can supply untrusted zone files where only a single or double quote replaces a service parameter value, triggering a panic that crashes the parsing process.

Affected products

Hickory DNS/Hickory DNSllm-fuzzy
Range: 0.20.1 <= x < 0.26.2

Patches

Vulnerability mechanics

References

github.com/hickory-dns/hickory-dns/security/advisories/GHSA-wgfr-mphw-j5g4nvd
www.vulncheck.com/advisories/hickory-dns-from-0.20.1-before-0.26.2-panic-in-svcb-https-zone-file-parsernvd

News mentions

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