{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-42004","assignerOrgId":"8ce71d90-2354-404b-a86e-bec2cc4e6981","state":"PUBLISHED","assignerShortName":"OX","dateReserved":"2026-04-23T11:15:21.198Z","datePublished":"2026-06-25T12:24:20.140Z","dateUpdated":"2026-06-25T13:44:07.962Z"},"containers":{"cna":{"providerMetadata":{"orgId":"8ce71d90-2354-404b-a86e-bec2cc4e6981","shortName":"OX","dateUpdated":"2026-06-25T12:24:20.140Z"},"title":"EDNS options smuggling","datePublic":"2026-06-24T22:00:00.000Z","problemTypes":[{"descriptions":[{"lang":"en","description":"Misinterpretation of Input","type":"CWE"}]}],"affected":[{"vendor":"PowerDNS","product":"DNSdist","collectionURL":"https://repo.powerdns.com/","packageName":"dnsdist","repo":"https://github.com/PowerDNS/pdns","modules":["EDNS processing"],"programFiles":["dnsdist-ecs.cc"],"versions":[{"status":"affected","version":"1.9.0","lessThan":"1.9.15","versionType":"semver"},{"status":"affected","version":"2.0.0","lessThan":"2.0.7","versionType":"semver"}],"defaultStatus":"unaffected"}],"descriptions":[{"lang":"en","value":"An attacker can send a crafted EDNS OPT record that will be ignored by DNSdist’s filtering rules, but will be rewritten as a valid OPT record when EDNS Client Subnet is inserted, causing the backend to see the EDNS option(s) that DNSdist did not filter.","supportingMedia":[{"type":"text/html","base64":false,"value":"<p>An attacker can send a crafted EDNS OPT record that will be ignored by DNSdist’s filtering rules, but will be rewritten as a valid OPT record when EDNS Client Subnet is inserted, causing the backend to see the EDNS option(s) that DNSdist did not filter.</p>"}]}],"references":[{"url":"https://www.dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2026-09.html"}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"LOW","availabilityImpact":"NONE","baseSeverity":"LOW","baseScore":3.7,"vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N"}}],"credits":[{"lang":"en","value":"Vitaly Simonovich","type":"finder"}],"source":{"discovery":"UNKNOWN"},"x_generator":{"engine":"Vulnogram 1.0.2"}},"adp":[{"problemTypes":[{"descriptions":[{"type":"CWE","cweId":"CWE-115","lang":"en","description":"CWE-115 Misinterpretation of Input"}]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-25T13:44:02.980438Z","id":"CVE-2026-42004","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-06-25T13:44:07.962Z"}}]}}