What is CVE-2026-33256?

CVE-2026-33256 is a medium-severity vulnerability in Powerdns Recursor. CVSS score: 5.3/10. Published 2026-04-22.

How severe is CVE-2026-33256?

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

Vulnerability in Powerdns Recursor

CVE-2026-33256

An attacker can send a web request that causes unlimited memory allocation in the internal web server, leading to a denial of service. The internal web server is disabled by default.

EPSS: 0.000 (0.0th 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 5.4.0, 5.3.0, 5.2.0

References

docs.powerdns.com/recursor/security-advisories/powerdns-advisory-powerdns-2026-…

Frequently asked questions

What is CVE-2026-33256?: CVE-2026-33256 is a medium-severity vulnerability in Powerdns Recursor. CVSS score: 5.3/10. Published 2026-04-22.
How severe is CVE-2026-33256?: Medium severity. CVSS v3 base score is 5.3 out of 10.