CVE-2026-0398 Details
Description
Crafted zones can lead to increased resource usage and crafted CNAME chains can lead to cache poisoning in Recursor.
A vulnerability in PowerDNS Recursor has been identified, where crafted zones can lead to increased resource usage, and manipulated CNAME chains can cause cache poisoning. This issue affects PowerDNS Recursor versions prior to 5.1.10, 5.2.8, and 5.3.5.
Users are advised to upgrade to PowerDNS Recursor versions 5.1.10, 5.2.8, or 5.3.5.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Feb 9, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2026-01.html | [email protected] | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-770 | Allocation of Resources Without Limits or Throttling | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| powerdns recursor | >= 5.1.0, < 5.1.10 >= 5.2.8, < 5.2.8 >= 5.3.0, < 5.3.5 |
CPE
Remediation
| |
Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 20, 2026 | Initial Analysis | [email protected] |
| Feb 9, 2026 | CVE Modified | CISA-ADP |
| Feb 9, 2026 | New CVE Received | [email protected] |