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{
"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": {
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"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"
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}