{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-33259","assignerOrgId":"8ce71d90-2354-404b-a86e-bec2cc4e6981","state":"PUBLISHED","assignerShortName":"OX","dateReserved":"2026-03-18T10:06:16.573Z","datePublished":"2026-04-22T09:38:51.991Z","dateUpdated":"2026-04-22T18:10:14.046Z"},"containers":{"cna":{"providerMetadata":{"orgId":"8ce71d90-2354-404b-a86e-bec2cc4e6981","shortName":"OX","dateUpdated":"2026-04-22T09:38:51.991Z"},"title":"Concurrent modification of RPZ data can lead to denial of servce","datePublic":"2026-04-21T22:00:00.000Z","problemTypes":[{"descriptions":[{"lang":"en","description":"Use After Free","type":"CWE"}]}],"affected":[{"vendor":"PowerDNS","product":"Recursor","collectionURL":"https://repo.powerdns.com/","packageName":"pdns-recursor","repo":"https://github.com/PowerDNS/pdns","modules":["RPZ"],"programFiles":["filterpo.hh"],"versions":[{"status":"affected","version":"5.4.0","lessThan":"5.4.1","versionType":"semver"},{"status":"affected","version":"5.3.0","lessThan":"5.3.6","versionType":"semver"},{"status":"affected","version":"5.2.0","lessThan":"5.2.9","versionType":"semver"}],"defaultStatus":"unaffected"}],"descriptions":[{"lang":"en","value":"Having many concurrent transfers of the same RPZ can lead to inconsistent RPZ data, use after free and/or a crash of the recursor. Normally concurrent transfers of the same RPZ zone can only occur with a malfunctioning RPZ provider.","supportingMedia":[{"type":"text/html","base64":false,"value":"<p>Having many concurrent transfers of the same RPZ can lead to inconsistent RPZ data, use after free and/or a crash of the recursor. Normally concurrent transfers of the same RPZ zone can only occur with a malfunctioning RPZ provider.</p>"}]}],"references":[{"url":"https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-powerdns-2026-03.html"}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"HIGH","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"LOW","availabilityImpact":"HIGH","baseSeverity":"MEDIUM","baseScore":5,"vectorString":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:H"}}],"credits":[{"lang":"en","value":"Haruto Kimura (Stella)","type":"finder"}],"source":{"discovery":"UNKNOWN"},"x_generator":{"engine":"Vulnogram 1.0.1"}},"adp":[{"problemTypes":[{"descriptions":[{"type":"CWE","cweId":"CWE-416","lang":"en","description":"CWE-416 Use After Free"}]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-04-22T17:52:55.860673Z","id":"CVE-2026-33259","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":"2026-04-22T18:10:14.046Z"}}]}}