Vulnerability in Powerdns Dnsdist

CVE-2026-33593

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

EPSS: 0.004 (30.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Powerdns Dnsdist — versions 1.9.0, 2.0.0

Weakness classification (CWE)

CWE-369 — Divide By Zero

References

security@open-xchange.com (Vendor Advisory)

Frequently asked questions

What is CVE-2026-33593?: CVE-2026-33593 is a high-severity vulnerability in Powerdns Dnsdist, classified under Divide By Zero. CVSS score: 7.5/10. Published 2026-04-22.
How severe is CVE-2026-33593?: High severity. CVSS v3 base score is 7.5 out of 10.