{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-33256", "assignerOrgId": "8ce71d90-2354-404b-a86e-bec2cc4e6981", "state": "PUBLISHED", "assignerShortName": "OX", "dateReserved": "2026-03-18T10:06:16.572Z", "datePublished": "2026-04-22T09:37:32.538Z", "dateUpdated": "2026-04-22T18:10:36.938Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "8ce71d90-2354-404b-a86e-bec2cc4e6981", "shortName": "OX", "dateUpdated": "2026-04-22T09:37:32.538Z"}, "title": "Unbounded memory allocation by internal web server", "datePublic": "2026-04-21T22:00:00.000Z", "problemTypes": [{"descriptions": [{"lang": "en", "description": "Allocation of Resources Without Limits or Throttling", "type": "CWE"}]}], "affected": [{"vendor": "PowerDNS", "product": "Recursor", "collectionURL": "https://repo.powerdns.com/", "packageName": "pdns-recursor", "repo": "https://github.com/PowerDNS/pdns", "modules": ["webserver"], "programFiles": ["web.rs"], "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": "An attacker can send a web request that causes unlimited memory allocation in the internal web server, leading to a denial of service. The internal web server is disabled by default.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>An attacker can send a web request that causes unlimited memory allocation in the internal web server, leading to a denial of service. The internal web server is disabled by default.</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": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "LOW", "baseSeverity": "MEDIUM", "baseScore": 5.3, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"}}], "credits": [{"lang": "en", "value": "Ap4sh - Samy Medjahed and Ethicxz - Eliott Laurie Ap4sh / Ethicxz", "type": "finder"}], "source": {"discovery": "UNKNOWN"}, "x_generator": {"engine": "Vulnogram 1.0.1"}}, "adp": [{"problemTypes": [{"descriptions": [{"type": "CWE", "cweId": "CWE-770", "lang": "en", "description": "CWE-770 Allocation of Resources Without Limits or Throttling"}]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-04-22T17:54:46.998810Z", "id": "CVE-2026-33256", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"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": "2026-04-22T18:10:36.938Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-33256", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-04-22T17:54:46.998810Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-770", "description": "CWE-770 Allocation of Resources Without Limits or Throttling"}]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-04-22T18:00:39.099Z"}}], "cna": {"title": "Unbounded memory allocation by internal web server", "source": {"discovery": "UNKNOWN"}, "credits": [{"lang": "en", "type": "finder", "value": "Ap4sh - Samy Medjahed and Ethicxz - Eliott Laurie Ap4sh / Ethicxz"}], "metrics": [{"format": "CVSS", "cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "affected": [{"repo": "https://github.com/PowerDNS/pdns", "vendor": "PowerDNS", "modules": ["webserver"], "product": "Recursor", "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"}], "packageName": "pdns-recursor", "programFiles": ["web.rs"], "collectionURL": "https://repo.powerdns.com/", "defaultStatus": "unaffected"}], "datePublic": "2026-04-21T22:00:00.000Z", "references": [{"url": "https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-powerdns-2026-03.html"}], "x_generator": {"engine": "Vulnogram 1.0.1"}, "descriptions": [{"lang": "en", "value": "An attacker can send a web request that causes unlimited memory allocation in the internal web server, leading to a denial of service. The internal web server is disabled by default.", "supportingMedia": [{"type": "text/html", "value": "<p>An attacker can send a web request that causes unlimited memory allocation in the internal web server, leading to a denial of service. The internal web server is disabled by default.</p>", "base64": false}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "description": "Allocation of Resources Without Limits or Throttling"}]}], "providerMetadata": {"orgId": "8ce71d90-2354-404b-a86e-bec2cc4e6981", "shortName": "OX", "dateUpdated": "2026-04-22T09:37:32.538Z"}}}, "cveMetadata": {"cveId": "CVE-2026-33256", "state": "PUBLISHED", "dateUpdated": "2026-04-22T18:10:36.938Z", "dateReserved": "2026-03-18T10:06:16.572Z", "assignerOrgId": "8ce71d90-2354-404b-a86e-bec2cc4e6981", "datePublished": "2026-04-22T09:37:32.538Z", "assignerShortName": "OX"}, "dataVersion": "5.2"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:powerdns:recursor:*:*:*:*:*:*:*:*", "matchCriteriaId": "EBDA7C62-FAD4-470C-A6FE-4CF19B0BD4AD", "versionEndExcluding": "5.2.9", "versionStartIncluding": "5.2.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:powerdns:recursor:*:*:*:*:*:*:*:*", "matchCriteriaId": "9F7AC884-348F-47B1-8853-49BFEDBEA9EA", "versionEndExcluding": "5.3.6", "versionStartIncluding": "5.3.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:powerdns:recursor:5.4.0:*:*:*:*:*:*:*", "matchCriteriaId": "4B201BAD-5A74-45E9-91FD-5E950BA18BF3", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "An attacker can send a web request that causes unlimited memory allocation in the internal web server, leading to a denial of service. The internal web server is disabled by default."}], "id": "CVE-2026-33256", "lastModified": "2026-04-27T17:04:04.123", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "[email protected]", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "[email protected]", "type": "Primary"}]}, "published": "2026-04-22T10:16:51.193", "references": [{"source": "[email protected]", "tags": ["Vendor Advisory", "Broken Link"], "url": "https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-powerdns-2026-03.html"}], "sourceIdentifier": "[email protected]", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-770"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{}