{"id":"CVE-2026-123578","aliases":[],"cve":{"records":[{"id":"CVE-2026-123578","source":"VulnCheck","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-11-06T00:55:55.660Z","published":"2026-11-08T01:38:13.386Z","modified":"2026-11-09T13:55:32.578Z"}],"publishers":[{"name":"VulnCheck","role":"CNA","organizationId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","modified":"2026-11-08T01:38:13.386Z"},{"name":"CISA-ADP","role":"ADP","organizationId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","modified":"2026-11-09T13:55:32.578Z"}],"references":[{"url":"https://github.com/hickory-dns/hickory-dns/security/advisories/GHSA-3w89-7rx5-hpwx","tags":["vendor-advisory"],"source":"VulnCheck"},{"url":"https://www.vulncheck.com/advisories/hickory-dns-0.26.0-before-0.26.2-response-validation-bypass-via-qdcount-0","tags":["third-party-advisory"],"source":"VulnCheck"}],"weaknesses":[{"id":"CWE-290","description":"Authentication Bypass by Spoofing","source":"VulnCheck"}],"applicability":[],"prioritization":[{"source":"CISA-ADP","type":"SSVC","role":"CISA Coordinator","timestamp":"2026-11-09T13:55:19.838132Z","decisions":[{"name":"Exploitation","value":"none"},{"name":"Automatable","value":"no"},{"name":"Technical Impact","value":"partial"}]}]},"title":"Hickory DNS 0.26.0 before 0.26.2 Response Validation Bypass via QDCOUNT=0","titleSource":"VulnCheck","descriptionSource":"VulnCheck","description":"Hickory DNS hickory-net 0.26.0 before 0.26.2 and hickory-proto 0.25.0 through 0.25.2 skip the check that a UDP response's question section matches the query when the response has an empty question section (QDCOUNT=0), and also skip the case-randomization check. Remote attackers able to inject spoofed UDP responses can send QDCOUNT=0 responses to bypass these checks, weakening defenses against DNS spoofing.","score":6.3,"severity":"medium","published":"2026-11-08T01:38:13.386Z","modified":"2026-11-09T13:55:32.578Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"hickory-dns","name":"hickory-dns","platforms":[],"versions":[{"version":"0.26.0","status":"affected","lessThan":"0.26.2","versionType":"semver"},{"version":"0.26.2","status":"unaffected","versionType":"semver"}],"defaultStatus":"unaffected","packageURL":"pkg:cargo/hickory-net","packageIdentity":{"ecosystem":"crates.io","name":"hickory-net"},"cpes":[],"source":"VulnCheck","url":"https://www.cve.org/CVERecord?id=CVE-2026-123578"},{"vendor":"hickory-dns","name":"hickory-dns","platforms":[],"versions":[{"version":"0.25.0","status":"affected","lessThanOrEqual":"0.25.2","versionType":"semver"}],"defaultStatus":"unaffected","packageURL":"pkg:cargo/hickory-proto","packageIdentity":{"ecosystem":"crates.io","name":"hickory-proto"},"cpes":[],"source":"VulnCheck","url":"https://www.cve.org/CVERecord?id=CVE-2026-123578"}],"remediation":[],"references":["https://github.com/hickory-dns/hickory-dns/security/advisories/GHSA-3w89-7rx5-hpwx","https://www.vulncheck.com/advisories/hickory-dns-0.26.0-before-0.26.2-response-validation-bypass-via-qdcount-0"],"sources":[{"name":"CVE","id":"CVE-2026-123578","modified":"2026-11-09T13:55:32.578Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-123578"}],"assessments":[{"source":"VulnCheck","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","score":6.3},{"source":"VulnCheck","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","score":3.7}],"sourceAffected":[],"observedAt":"2026-11-09T14:00:46.176Z","kev":{"status":"not-listed","checkedAt":"2026-11-15T01:25:32.844Z"},"coverage":[{"source":"NVD","status":"available","checkedAt":"2026-11-08T02:35:35.989Z","attemptedAt":"2026-11-08T02:35:35.989Z"},{"source":"GHSA","status":"no-result","checkedAt":"2026-11-08T02:35:36.134Z","attemptedAt":"2026-11-08T02:35:36.134Z"},{"source":"EUVD","status":"no-result","checkedAt":"2026-11-08T02:35:36.595Z","attemptedAt":"2026-11-08T02:35:36.595Z"},{"source":"EPSS","status":"no-result","checkedAt":"2026-11-08T02:35:36.435Z","attemptedAt":"2026-11-08T02:35:36.435Z"}],"evidence":[{"source":"NVD","id":"CVE-2026-123578","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-123578","modified":"2026-11-08T02:16:51.207","score":6.3,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","checkedAt":"2026-11-08T02:35:35.989Z"},{"source":"NVD","id":"CVE-2026-123578","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-123578","modified":"2026-11-08T02:16:51.207","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","checkedAt":"2026-11-08T02:35:35.989Z"}],"aiSummary":{"text":"Hickory DNS versions 0.26.0 before 0.26.2 and 0.25.0 through 0.25.2 have a response validation bypass weakness. An attacker with access to inject spoofed UDP responses can bypass checks.","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-11-08T02:11:44.600Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-123578"}]}}