What is CVE-2026-33597?

CVE-2026-33597 is a low-severity vulnerability in Powerdns Dnsdist, classified under Improper Encoding or Escaping of Output. CVSS score: 3.7/10. Published 2026-04-22.

How severe is CVE-2026-33597?

Low severity. CVSS v3 base score is 3.7 out of 10.

Vulnerability in Powerdns Dnsdist

CVE-2026-33597

PRSD detection denial of service

Published 2026-04-22 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L.

EPSS exploit prediction

EPSS: 0.008 (53.1th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 53.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.008 · change: +0.004

Affected products

Powerdns Dnsdist — versions 1.9.0, 2.0.0

Weakness classification (CWE)

CWE-116 — Improper Encoding or Escaping of Output

References

www.dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2026-04.html (Vendor Advisory)

Frequently asked questions

What is CVE-2026-33597?: CVE-2026-33597 is a low-severity vulnerability in Powerdns Dnsdist, classified under Improper Encoding or Escaping of Output. CVSS score: 3.7/10. Published 2026-04-22.
How severe is CVE-2026-33597?: Low severity. CVSS v3 base score is 3.7 out of 10.