{"id":"CVE-2026-123589","title":"Hickory DNS before 0.26.2 Denial of Service via Missing DNS-over-QUIC Request Read Timeout","summary":"The DNS-over-QUIC (DoQ) server in hickory-server (hickory-dns) before 0.26.2 does not apply any timeout when reading a request message from a QUIC stream, bypassing all configured timeouts. A remote unauthenticated client can open a conn…","severity":"medium","cvss":5.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","cvssSource":"cna","vendor":"hickory-dns","product":"hickory-dns","affected":["hickory-dns < 0.26.2"],"published":"2026-11-08","updated":"2026-11-08","sourceUpdated":"2026-11-08T01:38:20.968Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-123589","references":[{"url":"https://github.com/hickory-dns/hickory-dns/security/advisories/GHSA-g8wg-4mwh-fjfv","label":"GitHub Security Advisory (GHSA-g8wg-4mwh-fjfv)"},{"url":"https://www.vulncheck.com/advisories/hickory-dns-before-0.26.2-denial-of-service-via-missing-dns-over-quic-request-read-timeout","label":"VulnCheck Advisory: Hickory DNS before 0.26.2 Denial of Service via Missing DNS-over-QUIC Request Read Timeout"}],"tags":["cve.org"],"ingestedAt":"2026-11-08T02:43:18.648Z","slug":"CVE-2026-123589","body":"## Overview\n\nThe DNS-over-QUIC (DoQ) server in hickory-server (hickory-dns) before 0.26.2 does not apply any timeout when reading a request message from a QUIC stream, bypassing all configured timeouts. A remote unauthenticated client can open a connection and a request stream and hold it open indefinitely, consuming server resources and causing a denial of service.\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":"sunlit","depthScore":29,"depthScoreParts":{"impact":29.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}