What is CVE-2026-33598?

CVE-2026-33598 is a medium-severity vulnerability in Powerdns Dnsdist, classified under Out-of-bounds Read. CVSS score: 4.8/10. Published 2026-04-22.

How severe is CVE-2026-33598?

Medium severity. CVSS v3 base score is 4.8 out of 10.

Out-of-bounds Read in Powerdns Dnsdist

CVE-2026-33598

A cached crafted response can cause an out-of-bounds read if custom Lua code calls getDomainListByAddress() or getAddressListByDomain() on a packet cache.

Vulnerability class: Buffer Overflow

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

CVSS v3 metric

CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L.

EPSS exploit prediction

EPSS: 0.028 (86.2th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 86th percentile — 86.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.028 · change: +0.018

Affected products

Powerdns Dnsdist — versions 1.9.0, 2.0.0

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

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

Frequently asked questions

What is CVE-2026-33598?: CVE-2026-33598 is a medium-severity vulnerability in Powerdns Dnsdist, classified under Out-of-bounds Read. CVSS score: 4.8/10. Published 2026-04-22.
How severe is CVE-2026-33598?: Medium severity. CVSS v3 base score is 4.8 out of 10.