CVE-2026-33593

A client can trigger a divide by zero error leading to crash by sending a crafted DNSCrypt query.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://www.dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2026-04.html	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:powerdns:dnsdist::::::::
	cpe:2.3:a:powerdns:dnsdist::::::::

History

No history.

Information

Published : 2026-04-22 14:16

Updated : 2026-06-17 10:37

NVD link : CVE-2026-33593

Mitre link : CVE-2026-33593

CVE.ORG link : CVE-2026-33593

JSON object : View

Products Affected

powerdns

dnsdist

CWE

CWE-369

Divide By Zero

{"id": "CVE-2026-33593", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-33593", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-04-22T14:29:04.663683Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security@open-xchange.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "affected": [{"source": "security@open-xchange.com", "affectedData": [{"repo": "https://github.com/PowerDNS/pdns", "vendor": "PowerDNS", "modules": ["DNSCrypt"], "product": "DNSdist", "versions": [{"status": "affected", "version": "1.9.0", "lessThan": "1.9.13", "versionType": "semver"}, {"status": "affected", "version": "2.0.0", "lessThan": "2.0.4", "versionType": "semver"}], "packageName": "dnsdist", "programFiles": ["dnscrypt.cc"], "collectionURL": "https://repo.powerdns.com/", "defaultStatus": "unaffected"}]}], "published": "2026-04-22T14:16:53.713", "references": [{"url": "https://www.dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2026-04.html", "tags": ["Vendor Advisory"], "source": "security@open-xchange.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "description": [{"lang": "en", "value": "CWE-369"}]}], "descriptions": [{"lang": "en", "value": "A client can trigger a divide by zero error leading to crash by sending a crafted DNSCrypt query."}], "lastModified": "2026-06-17T10:37:45.447", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:powerdns:dnsdist:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "DCC2DF11-EC5C-4112-90F2-C266CB65D390", "versionEndExcluding": "1.9.13", "versionStartIncluding": "1.9.0"}, {"criteria": "cpe:2.3:a:powerdns:dnsdist:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "29865EC6-C1A0-40F3-B0BB-7F71F9C1DCB7", "versionEndExcluding": "2.0.4", "versionStartIncluding": "2.0.0"}], "operator": "OR"}]}], "sourceIdentifier": "security@open-xchange.com"}