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CVE-2026-33593

Denial of service via crafted DNSCrypt query

Published: Apr 22, 2026Updated: Apr 24, 2026 Sources: CVE List NVDCWE-369
NVD MITRE
7.5CVSSHIGH
EPSS Score
0.4%
Top 70.3%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

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

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-369

Affected Products

dnsdistpowerdns
On-prem
Networking Infrastructure / dns-dhcp-ntp
DNSdistPowerDNS
On-prem
Networking Infrastructure / dns-dhcp-ntp
powerdnsoss-projectDKNetworking Infrastructureaka powerdns recursor, powerdns authoritative, dnsdist

Exploitability

Official Patch Available

References

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

Timeline

Published
Apr 22, 2026
Last Updated
Apr 24, 2026

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