What is CVE-2026-33609?

CVE-2026-33609 is a medium-severity vulnerability in Powerdns Authoritative, classified under LDAP Injection. CVSS score: 5.3/10. Published 2026-04-22.

How severe is CVE-2026-33609?

Medium severity. CVSS v3 base score is 5.3 out of 10.

LDAP Injection in Powerdns Authoritative

CVE-2026-33609

Incomplete escaping of LDAP queries when running with 8bit-dns enabled allows users to perform queries of internal domain subtrees.

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

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.005 (38.5th percentile), scored 2026-10-19.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 38.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.005 · change: +0.002

Affected products

Powerdns Authoritative — versions 5.0.0, 4.9.0

Weakness classification (CWE)

CWE-90 — LDAP Injection

References

docs.powerdns.com/authoritative/security-advisories/powerdns-advisory-powerdns-… (Broken Link, Vendor Advisory)

Frequently asked questions

What is CVE-2026-33609?: CVE-2026-33609 is a medium-severity vulnerability in Powerdns Authoritative, classified under LDAP Injection. CVSS score: 5.3/10. Published 2026-04-22.
How severe is CVE-2026-33609?: Medium severity. CVSS v3 base score is 5.3 out of 10.