CVE-2026-33259

Name: CVE-2026-33259
Creator: NVD / NIST
Published: 2026-04-22T10:16:51.58+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5/10EPSS 0.22%

Last modified Jun 17, 2026

CVE-2026-33259 is a medium-severity vulnerability rated 5/10 on the CVSS scale. Having many concurrent transfers of the same RPZ can lead to inconsistent RPZ data, use after free and/or a crash of the recursor. Normally concurrent transfers of the same RPZ zone can only occur with a malfunctioning RPZ provider.. EPSS estimates a 0.22% chance of exploitation in the next 30 days.

Description

Having many concurrent transfers of the same RPZ can lead to inconsistent RPZ data, use after free and/or a crash of the recursor. Normally concurrent transfers of the same RPZ zone can only occur with a malfunctioning RPZ provider.

Metrics

CVSS 3.1

5/10

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:H

EPSS Probability

0.22%

13.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-416

Affected Software

Vendor	Product	Versions
Powerdns	Recursor	>= 5.2.0, < 5.2.9
Powerdns	Recursor	>= 5.3.0, < 5.3.6
Powerdns	Recursor	5.4.0

References

https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-powerdns-2026-03.htmlBroken Link, Vendor Advisory

Timeline

Published: Apr 22, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-33259?

How severe is CVE-2026-33259?

CVE-2026-33259 has a CVSS score of 5/10 (MEDIUM severity). The EPSS model estimates a 0.22% probability of exploitation in the next 30 days.

How do I fix CVE-2026-33259?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-33259?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST