Vulnerability in Powerdns Recursor

CVE-2026-0398

Crafted zones can lead to increased resource usage and crafted CNAME chains can lead to cache poisoning in Recursor.

EPSS: 0.000 (0.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

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

Affected products

Powerdns Recursor — versions 5.3.0, 5.2.0, 5.1.0

References

docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2026-01.html

Frequently asked questions

What is CVE-2026-0398?: CVE-2026-0398 is a medium-severity vulnerability in Powerdns Recursor. CVSS score: 5.3/10. Published 2026-02-09.
How severe is CVE-2026-0398?: Medium severity. CVSS v3 base score is 5.3 out of 10.