What is CVE-2026-33602?

CVE-2026-33602 is a medium-severity vulnerability in Powerdns Dnsdist. CVSS score: 6.5/10. Published 2026-04-22.

How severe is CVE-2026-33602?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Powerdns Dnsdist

CVE-2026-33602

A rogue backend can send a crafted UDP response with a query ID off by one related to the maximum configured value, triggering an out-of-bounds write leading to a denial of service.

EPSS: 0.000 (0.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H.

Affected products

Powerdns Dnsdist — versions 1.9.0, 2.0.0

References

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

Frequently asked questions

What is CVE-2026-33602?: CVE-2026-33602 is a medium-severity vulnerability in Powerdns Dnsdist. CVSS score: 6.5/10. Published 2026-04-22.
How severe is CVE-2026-33602?: Medium severity. CVSS v3 base score is 6.5 out of 10.