{"id":"CVE-2026-10846","state":"PUBLISHED","title":"Insufficient verification that responses belong to a query","description":"NLnet Labs ldns 1.2.0 up to and including versions 1.9.0, when used in applications as (stub) resolver over UDP, lacks matching the query destination address and port with the response source address and port. Furthermore not the query ID, neither the question of the query is matched with that of the response. This makes applications, that use ldns for (stub) resolver functionality over UDP, vulnerable for off-path poisoning attacks. The drill tool, which is shipped with ldns, suffers from this vulnerability.","publishedAt":"2026-06-10T06:37:59.538Z","updatedAt":"2026-06-10T14:45:59.412Z","severity":{"score":8.2,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","source":"NLnet Labs"},"assigner":"NLnet Labs","products":["NLnet Labs ldns"],"affected":[{"vendor":"NLnet Labs","product":"ldns","defaultStatus":"unaffected","versions":[{"version":"1.2.0","status":"affected","lessThan":"1.9.1","versionType":"semver"}]}],"references":["https://www.nlnetlabs.nl/downloads/ldns/CVE-2026-10846.txt","http://www.openwall.com/lists/oss-security/2026/06/10/2"],"weaknesses":["CWE-346"],"ingestedAt":"2026-10-29T20:10:33.477Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/10xxx/CVE-2026-10846.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-10846","state":"PUBLISHED","datePublished":"2026-06-10T06:37:59.538Z","dateUpdated":"2026-06-10T14:45:59.412Z","assignerShortName":"NLnet Labs","assignerOrgId":"206fc3a0-e175-490b-9eaa-a5738056c9f6","dateReserved":"2026-06-04T12:06:54.996Z"},"containers":{"cna":{"title":"Insufficient verification that responses belong to a query","descriptions":[{"lang":"en","value":"NLnet Labs ldns 1.2.0 up to and including versions 1.9.0, when used in applications as (stub) resolver over UDP, lacks matching the query destination address and port with the response source address and port. Furthermore not the query ID, neither the question of the query is matched with that of the response. This makes applications, that use ldns for (stub) resolver functionality over UDP, vulnerable for off-path poisoning attacks. The drill tool, which is shipped with ldns, suffers from this vulnerability."}],"affected":[{"vendor":"NLnet Labs","product":"ldns","defaultStatus":"unaffected","versions":[{"version":"1.2.0","status":"affected","lessThan":"1.9.1","versionType":"semver"}]}],"references":[{"url":"https://www.nlnetlabs.nl/downloads/ldns/CVE-2026-10846.txt","tags":["vendor-advisory"]}],"metrics":[{"cvssV4_0":{"baseScore":8.2,"baseSeverity":"HIGH","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","version":"4.0"},"format":"CVSS","scenarios":[{"lang":"en","value":"Applications directly or indirectly using the ldns_send_buffer function for (stub) resolving"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-346","description":"CWE-346 Origin Validation Error","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"NLnet Labs","orgId":"206fc3a0-e175-490b-9eaa-a5738056c9f6","dateUpdated":"2026-06-10T14:28:54.993Z"},"credits":[{"lang":"en","type":"finder","value":"Pablo Ruiz from 'codecome.ai'"}],"datePublic":"2026-06-10T00:00:00.000Z","solutions":[{"lang":"en","value":"This issue is fixed starting with version 1.9.2."}],"timeline":[{"lang":"en","time":"2026-05-14T00:00:00.000Z","value":"Issue reported by Pablo Ruiz"},{"lang":"en","time":"2026-06-02T00:00:00.000Z","value":"NLnet Labs shares patch"},{"lang":"en","time":"2026-06-02T00:00:00.000Z","value":"Pablo Ruiz verifies patch"},{"lang":"en","time":"2026-06-10T00:00:00.000Z","value":"Fix released with version 1.9.2"}],"x_generator":{"engine":"cvelib 1.8.0"}},"adp":[{"title":"CVE Program Container","references":[{"url":"http://www.openwall.com/lists/oss-security/2026/06/10/2"}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2026-06-10T11:15:23.130Z"}},{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-10T14:43:35.371858Z","id":"CVE-2026-10846","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-06-10T14:45:59.412Z"}}]}}}