CVE-2026-0398

Name: CVE-2026-0398
Creator: NVD / NIST
Published: 2026-02-09T15:16:11.36+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 0.41%

Last modified Jun 17, 2026

CVE-2026-0398 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. Crafted zones can lead to increased resource usage and crafted CNAME chains can lead to cache poisoning in Recursor.. EPSS estimates a 0.41% chance of exploitation in the next 30 days.

Description

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

Metrics

CVSS 3.1

5.3/10

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

EPSS Probability

0.41%

32.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-770

Affected Software

Vendor	Product	Versions
Powerdns	Recursor	>= 5.1.0, < 5.1.10
Powerdns	Recursor	>= 5.2.8, < 5.2.8
Powerdns	Recursor	>= 5.3.0, < 5.3.5

References

https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2026-01.htmlVendor Advisory

Timeline

Published: Feb 9, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-0398?

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

How severe is CVE-2026-0398?

CVE-2026-0398 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 0.41% probability of exploitation in the next 30 days.

How do I fix CVE-2026-0398?

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-2026-0398?

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

Scan your code now

Source: NVD / NIST