{"id":"CVE-2026-123576","title":"Hickory DNS 0.24.0 through 0.26.1 Memory Exhaustion via DNS-over-QUIC Requests","summary":"Hickory DNS 0.24.0 through 0.26.1 contains a memory exhaustion vulnerability that allows remote attackers to consume server resources by sending incomplete DNS-over-QUIC request bodies. Attackers can open many connections and send only l…","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 <= 0.26.1"],"published":"2026-11-08","updated":"2026-11-08","sourceUpdated":"2026-11-08T01:38:11.970Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-123576","references":[{"url":"https://github.com/hickory-dns/hickory-dns/security/advisories/GHSA-2f4m-fq7w-mrgx","label":"GitHub Security Advisory (GHSA-2f4m-fq7w-mrgx)"},{"url":"https://www.vulncheck.com/advisories/hickory-dns-0.24.0-through-0.26.1-memory-exhaustion-via-dns-over-quic-requests","label":"VulnCheck Advisory: Hickory DNS 0.24.0 through 0.26.1 Memory Exhaustion via DNS-over-QUIC Requests"}],"tags":["cve.org"],"ingestedAt":"2026-11-08T02:43:18.658Z","slug":"CVE-2026-123576","body":"## Overview\n\nHickory DNS 0.24.0 through 0.26.1 contains a memory exhaustion vulnerability that allows remote attackers to consume server resources by sending incomplete DNS-over-QUIC request bodies. Attackers can open many connections and send only large length prefixes, causing pre-allocated buffers to persist without timeout and exhausting server memory.\n\n## Affected\n\n- `hickory-dns >= 0.24.0 <= 0.26.1`\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":[]}