CVE-2026-33593 - Vulnerability Details - OpenCVE

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

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable yes

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

PowerDNS

DNSdist

unaffected

Version	Status	Constraints
`1.9.0`	affected	< 1.9.13
`2.0.0`	affected	< 2.0.4

No data.

No data.

No data.

Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References

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

History

Wed, 22 Apr 2026 15:15:00 +0000

Type	Values Removed	Values Added
Weaknesses		CWE-369
Metrics		ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Wed, 22 Apr 2026 14:15:00 +0000

Type	Values Removed	Values Added
Description		A client can trigger a divide by zero error leading to crash by sending a crafted DNSCrypt query.
Title		Denial of service via crafted DNSCrypt query
References		https://www.dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2026-04.html
Metrics		cvssV3_1 `{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}`

Projects

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MITRE

Status: PUBLISHED

Assigner: OX

Published: 2026-04-22T13:48:31.103Z

Updated: 2026-04-22T14:29:07.880Z

Reserved: 2026-03-23T12:57:56.813Z

Link: CVE-2026-33593

Vulnrichment

Updated: 2026-04-22T14:28:59.179Z

NVD

Status : Received

Published: 2026-04-22T14:16:53.713

Modified: 2026-04-22T15:16:12.827

Link: CVE-2026-33593

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

CWE-369

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