CVE-2026-0398
Medium
Description
Crafted zones can lead to increased resource usage and crafted CNAME chains can lead to cache poisoning in Recursor.
SeverityMedium
CVSS5.3
Exploit probability—
ProductPowerdns Recursor
PublishedFeb 9, 2026
First seenFeb 9, 2026
Weakness typeCWE-770Allocation of resources without limits
How to fix
Update
- powerdns recursor5.1.10, 5.2.8, 5.3.5 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| powerdns recursor | 5.1.0 ≤ v < 5.1.10, 5.2.8, 5.3.0 ≤ v < 5.3.5 | 5.1.10, 5.2.8, 5.3.5 |
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