{"id":"CVE-2026-123573","title":"hickory-dns from 0.20.1 before 0.26.2 Panic in SVCB/HTTPS Zone File Parser","summary":"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 replace…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cvssSource":"cna","cwe":["CWE-20"],"vendor":"hickory-dns","product":"hickory-dns","affected":["hickory-dns >= 0.20.1 < 0.26.2"],"published":"2026-11-08","updated":"2026-11-08","sourceUpdated":"2026-11-08T01:38:09.961Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-123573","references":[{"url":"https://github.com/hickory-dns/hickory-dns/security/advisories/GHSA-wgfr-mphw-j5g4","label":"GitHub Security Advisory (GHSA-wgfr-mphw-j5g4)"},{"url":"https://www.vulncheck.com/advisories/hickory-dns-from-0.20.1-before-0.26.2-panic-in-svcb-https-zone-file-parser","label":"VulnCheck Advisory: hickory-dns from 0.20.1 before 0.26.2 Panic in SVCB/HTTPS Zone File Parser"}],"tags":["cve.org"],"ingestedAt":"2026-11-08T02:43:18.656Z","slug":"CVE-2026-123573","body":"## Overview\n\nhickory-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.\n\n## Affected\n\n- `hickory-dns >= 0.20.1 < 0.26.2`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}