{"id":"CVE-2026-123575","title":"Hickory DNS before 0.26.2 DoH Memory Exhaustion via Incomplete Request Bodies","summary":"Hickory DNS before 0.26.2 contains a resource exhaustion vulnerability in its DNS-over-HTTPS HTTP/2 server that lacks sufficient timeouts or limits for incomplete request bodies. Remote attackers can open DoH connections, send incomplete…","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 < 0.26.2"],"published":"2026-11-08","updated":"2026-11-08","sourceUpdated":"2026-11-08T01:38:11.288Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-123575","references":[{"url":"https://github.com/hickory-dns/hickory-dns/security/advisories/GHSA-g5xf-qv55-wv37","label":"GitHub Security Advisory (GHSA-g5xf-qv55-wv37)"},{"url":"https://www.vulncheck.com/advisories/hickory-dns-before-0.26.2-doh-memory-exhaustion-via-incomplete-request-bodies","label":"VulnCheck Advisory: Hickory DNS before 0.26.2 DoH Memory Exhaustion via Incomplete Request Bodies"}],"tags":["cve.org"],"ingestedAt":"2026-11-08T02:43:18.655Z","slug":"CVE-2026-123575","body":"## Overview\n\nHickory DNS before 0.26.2 contains a resource exhaustion vulnerability in its DNS-over-HTTPS HTTP/2 server that lacks sufficient timeouts or limits for incomplete request bodies. Remote attackers can open DoH connections, send incomplete request bodies, and hold connections open to exhaust server memory.\n\n## Affected\n\n- `hickory-dns < 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":[]}