{"id":"CVE-2026-123574","title":"Hickory DNS 0.24.0 before 0.26.2 Denial of Service via Zone File Parser","summary":"The zone file parser in the hickory-proto crate of Hickory DNS 0.24.0 before 0.26.2 panics when a single token in a zone file is 4096 bytes or longer. Attackers who can supply untrusted zone files to an application using the parser can t…","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 >= 0.24.0 < 0.26.2"],"published":"2026-11-08","updated":"2026-11-08","sourceUpdated":"2026-11-08T01:38:10.613Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-123574","references":[{"url":"https://github.com/hickory-dns/hickory-dns/security/advisories/GHSA-4rph-pmrw-mwpw","label":"GitHub Security Advisory (GHSA-4rph-pmrw-mwpw)"},{"url":"https://www.vulncheck.com/advisories/hickory-dns-0.24.0-before-0.26.2-denial-of-service-via-zone-file-parser","label":"VulnCheck Advisory: Hickory DNS 0.24.0 before 0.26.2 Denial of Service via Zone File Parser"}],"tags":["cve.org"],"ingestedAt":"2026-11-08T02:43:18.656Z","slug":"CVE-2026-123574","body":"## Overview\n\nThe zone file parser in the hickory-proto crate of Hickory DNS 0.24.0 before 0.26.2 panics when a single token in a zone file is 4096 bytes or longer. Attackers who can supply untrusted zone files to an application using the parser can trigger the panic to cause a denial of service.\n\n## Affected\n\n- `hickory-dns >= 0.24.0 < 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":[]}