{"id":"CVE-2026-123577","title":"Hickory DNS 0.24.0 before 0.26.2 DoH Unbounded Request Body Denial of Service","summary":"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…","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-770"],"vendor":"hickory-dns","product":"hickory-dns","affected":["hickory-dns >= 0.24.0 < 0.26.2"],"published":"2026-11-08","updated":"2026-11-08","sourceUpdated":"2026-11-08T01:38:12.696Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-123577","references":[{"url":"https://github.com/hickory-dns/hickory-dns/security/advisories/GHSA-5r56-v84h-c3w5","label":"GitHub Security Advisory (GHSA-5r56-v84h-c3w5)"},{"url":"https://www.vulncheck.com/advisories/hickory-dns-0.24.0-before-0.26.2-doh-unbounded-request-body-denial-of-service","label":"VulnCheck Advisory: Hickory DNS 0.24.0 before 0.26.2 DoH Unbounded Request Body Denial of Service"}],"tags":["cve.org"],"ingestedAt":"2026-11-08T02:43:18.654Z","slug":"CVE-2026-123577","body":"## Overview\n\nHickory 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.\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":[]}