{"id":"GHSA-6h5c-jjg5-wj59","revision":null,"records":[{"revision":"5f58f557ce664f508c336ebefb9a9e02","observedAt":"2026-11-09T15:02:10.78+00:00","statement":{"source":"cve-program","id":"CVE-2026-123606","aliases":[],"title":"Hickory-DNS Recursor 0.25.0-alpha.3 through 0.25.2 Glueless-NS Referral Amplification","description":"The hickory-dns recursor in hickory-recursor 0.25.0-alpha.3 through 0.25.2 and hickory-resolver 0.26.0-alpha.1 before 0.26.2 iterates every out-of-bailiwick NS target lacking glue in a referral without any per-query work budget. Remote attackers can serve such referrals to force A and AAAA lookups per target, amplifying traffic against remote servers or exhausting recursor resources.","state":0,"publishedAt":"2026-11-08T01:38:32.727+00:00","modifiedAt":"2026-11-09T13:52:33.572+00:00","affected":[{"ecosystem":"Vendor product","name":"hickory-dns","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"hickory-dns\",\n                    \"product\": \"hickory-dns\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"packageURL\": \"pkg:cargo/hickory-recursor\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0.25.0-alpha.3\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThanOrEqual\": \"0.25.2\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"hickory-dns","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"hickory-dns\",\n                    \"product\": \"hickory-dns\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"packageURL\": \"pkg:cargo/hickory-resolver\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0.26.0-alpha.1\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThan\": \"0.26.2\"\n                        },\n                        {\n                            \"version\": \"0.26.2\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","score":8.7,"severity":"HIGH"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":"HIGH"}],"references":["https://github.com/hickory-dns/hickory-dns/security/advisories/GHSA-6h5c-jjg5-wj59","https://www.vulncheck.com/advisories/hickory-dns-recursor-0.25.0-alpha.3-through-0.25.2-glueless-ns-referral-amplification"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-123606","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-123606","identifiers":["CVE-2026-123606"]},"retained":false,"historicalAffected":[]},{"revision":"1ad944b743b144ccab1f30c4cf041756","observedAt":"2026-11-14T15:57:53.35+00:00","statement":{"source":"euvd","id":"EUVD-2026-119365","aliases":["CVE-2026-123606","GHSA-5p73-2jm7-2cmq"],"title":"The hickory-dns recursor in hickory-recursor 0.25.0-alpha.3 through 0.25.2 and hickory-resolver 0.26.0-alpha.1 before 0.26.2 iterates every out-of-bailiwick NS target lacking glue in a referral without any per-query work budget. Remote atta…","description":"The hickory-dns recursor in hickory-recursor 0.25.0-alpha.3 through 0.25.2 and hickory-resolver 0.26.0-alpha.1 before 0.26.2 iterates every out-of-bailiwick NS target lacking glue in a referral without any per-query work budget. 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Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-119365","identifiers":["EUVD-2026-119365","CVE-2026-123606","GHSA-5p73-2jm7-2cmq"]},"retained":false,"historicalAffected":[]},{"revision":"b341479355c844f68191fcd0322a074f","observedAt":"2026-11-12T15:18:38.266+00:00","statement":{"source":"nvd","id":"CVE-2026-123606","aliases":[],"title":"The hickory-dns recursor in hickory-recursor 0.25.0-alpha.3 through 0.25.2 and hickory-resolver 0.26.0-alpha.1 before 0.26.2 iterates every out-of-bailiwick NS target lacking glue in a referral without any per-query work budget. Remote atta…","description":"The hickory-dns recursor in hickory-recursor 0.25.0-alpha.3 through 0.25.2 and hickory-resolver 0.26.0-alpha.1 before 0.26.2 iterates every out-of-bailiwick NS target lacking glue in a referral without any per-query work budget. Remote attackers can serve such referrals to force A and AAAA lookups per target, amplifying traffic against remote servers or exhausting recursor resources.","state":0,"publishedAt":"2026-11-08T02:16:55.583+00:00","modifiedAt":"2026-11-10T22:15:59.797+00:00","affected":[],"metrics":[{"system":"CVSS 4.0 · disclosure@vulncheck.com · Secondary","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/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","score":8.7,"severity":"HIGH"},{"system":"CVSS 3.1 · disclosure@vulncheck.com · Secondary","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":"HIGH"}],"references":["https://github.com/hickory-dns/hickory-dns/security/advisories/GHSA-6h5c-jjg5-wj59","https://www.vulncheck.com/advisories/hickory-dns-recursor-0.25.0-alpha.3-through-0.25.2-glueless-ns-referral-amplification"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-123606","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Deferred","weaknesses":["CWE-400"],"productCriteria":[],"sourceDates":{"published":"2026-11-08T02:16:55.583","lastModified":"2026-11-10T22:15:59.797"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-123606","identifiers":["CVE-2026-123606"]},"retained":false,"historicalAffected":[]},{"revision":"d0db52df6d084dfc8286ed3c0916c6ba","observedAt":"2026-11-12T15:18:33.301+00:00","statement":{"source":"osv","id":"RUSTSEC-2026-0515","aliases":["CVE-2026-123606","GHSA-6h5c-jjg5-wj59","RUSTSEC-2026-0521"],"title":"Recursor followed every glueless name server in a referral, with no per-query budget","description":"When a referral listed name servers outside the delegated zone and gave no glue addresses, the recursor looked up A and AAAA records for every listed name server, recursing into each one. Only the chain-depth limits applied. There was no cap on how many name servers it chased per referral or on the total upstream work per client query.\n\nSomeone who controls a zone can return referrals that list many glueless name servers in a victim's domain, and nest them, so that each client query makes the recursor send a large number of queries to the victim's servers (the NXNSAttack pattern). The same can exhaust the recursor's own resources.\n\nThis affects the recursive resolver, which is in hickory-resolver behind the opt-in `recursor` feature from 0.26.0-beta.1. Earlier releases shipped it as the separate hickory-recursor crate.\n\nFrom 0.26.2 the recursor follows at most 5 glueless name servers per delegation and sends at most 200 upstream queries per client request.","state":0,"publishedAt":"2026-09-03T12:00:00+00:00","modifiedAt":"2026-11-12T14:40:53.9136325+00:00","affected":[{"ecosystem":"crates.io","name":"hickory-resolver","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0.26.0-beta.1"},{"kind":"fixed","version":"0.26.2"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[],"references":["https://crates.io/crates/hickory-resolver","https://rustsec.org/advisories/RUSTSEC-2026-0515.html","https://github.com/hickory-dns/hickory-dns/commit/74062f3a3ef6904b64717dd025945702b2cf4133","https://github.com/hickory-dns/hickory-dns/commit/47cd005b8f3d190134bbb943d2328ef8a83ade8c"],"sourceUrl":"https://osv.dev/vulnerability/RUSTSEC-2026-0515","license":"OSV · upstream source license applies","key":"osv:RUSTSEC-2026-0515","identifiers":["RUSTSEC-2026-0515","CVE-2026-123606","GHSA-6h5c-jjg5-wj59","RUSTSEC-2026-0521"]},"retained":false,"historicalAffected":[]},{"revision":"876045bad0c947e09c6142eb3e43faf8","observedAt":"2026-11-12T15:18:33.301+00:00","statement":{"source":"osv","id":"RUSTSEC-2026-0521","aliases":["CVE-2026-123606","GHSA-6h5c-jjg5-wj59","RUSTSEC-2026-0515"],"title":"Recursor followed every glueless name server in a referral (no fixed hickory-recursor release)","description":"For referrals whose name servers are outside the delegated zone and come without glue, the recursor resolved every listed name server, with no cap on referral width and no per-query work budget. Someone who controls a zone can use this to make each client query send a large number of queries to a victim's servers (the NXNSAttack pattern), or to exhaust the recursor.\n\nThe recursor code moved into hickory-resolver (opt-in `recursor` feature) in 0.26.0-beta.1, and the fix is in hickory-resolver 0.26.2. No hickory-recursor release contains a fix, so users should move to hickory-resolver 0.26.2 or later with the `recursor` feature.","state":0,"publishedAt":"2026-09-03T12:00:00+00:00","modifiedAt":"2026-11-12T14:40:53.9136325+00:00","affected":[{"ecosystem":"crates.io","name":"hickory-recursor","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0.25.0-alpha.3"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[],"references":["https://crates.io/crates/hickory-recursor","https://rustsec.org/advisories/RUSTSEC-2026-0521.html","https://github.com/hickory-dns/hickory-dns/commit/74062f3a3ef6904b64717dd025945702b2cf4133","https://github.com/hickory-dns/hickory-dns/commit/47cd005b8f3d190134bbb943d2328ef8a83ade8c"],"sourceUrl":"https://osv.dev/vulnerability/RUSTSEC-2026-0521","license":"OSV · upstream source license applies","key":"osv:RUSTSEC-2026-0521","identifiers":["RUSTSEC-2026-0521","CVE-2026-123606","GHSA-6h5c-jjg5-wj59","RUSTSEC-2026-0515"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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Not a global EUVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-19d3a167288748059b764510b42a56e1","complete":true,"records":13821,"lastAttemptAt":"2026-11-15T00:39:00.6890084+00:00","lastSuccessAt":"2026-11-15T00:39:00.683+00:00","error":null,"lastVerifiedAt":"2026-11-15T00:39:00.683+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13874,"expectedIdentifiers":13874,"failedIdentifiers":0},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-11-15T00:30:35.7025358+00:00","complete":true,"records":1125,"lastAttemptAt":"2026-11-15T00:30:35.7025358+00:00","lastSuccessAt":"2026-11-15T00:30:35.8620517+00:00","error":null,"lastVerifiedAt":"2026-11-15T00:30:35.8620552+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-a2d6726fa6984ccea1afed1a3e59d87e","complete":true,"records":13833,"lastAttemptAt":"2026-11-15T00:31:15.0819052+00:00","lastSuccessAt":"2026-11-15T00:31:15.078+00:00","error":null,"lastVerifiedAt":"2026-11-15T00:31:15.078+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13874,"expectedIdentifiers":13874,"failedIdentifiers":0},{"source":"osv:Go","scope":"Complete OSV Go ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"go-64eea06dbd27de8464d5dbce1b78cc794cc59e2d901516ae0d3ea76e624cdae0","complete":true,"records":9955,"lastAttemptAt":"2026-11-15T00:30:35.4763058+00:00","lastSuccessAt":"2026-11-14T13:57:23.1208135+00:00","error":null,"lastVerifiedAt":"2026-11-15T00:30:35.4763058+00:00","snapshotPublishedAt":"2026-11-14T13:17:57+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:NuGet","scope":"Complete OSV NuGet ecosystem archive, including GitHub Advisory Database records; NuGet version matching only","generation":"nuget-f4424d7d4861b1af1404bd15abcb83f295dcd003412a9340ca99dc8200aa148a","complete":true,"records":2014,"lastAttemptAt":"2026-11-15T00:30:35.2641931+00:00","lastSuccessAt":"2026-11-13T19:57:08.2864435+00:00","error":null,"lastVerifiedAt":"2026-11-15T00:30:35.2641931+00:00","snapshotPublishedAt":"2026-11-13T19:33:10+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:crates.io","scope":"Complete OSV crates.io ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"crates.io-012aff9b2fb349d53e2c4bace6ca57956b6f5f9d82c1dc9fdc1c9b3c738f8977","complete":true,"records":3148,"lastAttemptAt":"2026-11-15T00:30:35.583275+00:00","lastSuccessAt":"2026-11-14T04:57:03.8279646+00:00","error":null,"lastVerifiedAt":"2026-11-15T00:30:35.583275+00:00","snapshotPublishedAt":"2026-11-14T03:02:50+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:npm","scope":"Complete OSV npm ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"npm-bfbc75e561bfffdd0ad20c592902934adbd2d0a701402c5539bbccd9991fe78c","complete":true,"records":232472,"lastAttemptAt":"2026-11-15T00:30:35.36985+00:00","lastSuccessAt":"2026-11-14T21:27:13.9659762+00:00","error":null,"lastVerifiedAt":"2026-11-15T00:30:35.36985+00:00","snapshotPublishedAt":"2026-11-14T20:48:01+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null}]}