CVE-2026-123573

CVSS 8.7 (high) · published 2026-11-08

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.

Weakness: CWE-20

Source: NVD CVE-2026-123573

References

• https://github.com/hickory-dns/hickory-dns/security/advisories/GHSA-wgfr-mphw-j5g4
• https://www.vulncheck.com/advisories/hickory-dns-from-0.20.1-before-0.26.2-panic-in-svcb-https-zone-file-parser

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