CVE Field Guide
About Us
CVE-2026-33593
PUBLISHED
Denial of service via crafted DNSCrypt query
Assigner:
OX
Reserved:
23.03.2026
Published:
22.04.2026
Updated:
22.04.2026
A client can trigger a divide by zero error leading to crash by sending a crafted DNSCrypt query.
Metrics
CVSS 3.1
CVSS Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS Score:
7.5
CVSS score
7.5
Attack Vector
Network
Scope
Unchanged
Attack Complexity
Low
Confidentiality Impact
None
Privileges Required
None
Integrity Impact
None
User Interaction
None
Availability Impact
High
CVSS 3.1
Product Status
Vendor
PowerDNS
Product
DNSdist
Versions
Default:
unaffected
affected from 1.9.0 to 1.9.13 (excl.)
affected from 2.0.0 to 2.0.4 (excl.)
Credits
Haruto Kimura (Stella)
finder
References
https://www.dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2026-04.html
Problem Types
Divide By Zero
CWE