CVE-2026-33601
Medium
Description
If you use the zoneToCache function with a malicious authoritative server, an attacker can send a zone that result in a null pointer dereference, caused by a missing consistency check and leading to a denial of service.
SeverityMedium
CVSS4.4
Exploit probability—
ProductPowerdns Recursor
PublishedApr 22, 2026
First seenApr 22, 2026
Weakness typeCWE-476NULL pointer dereference
How to fix
Update
- powerdns recursor5.2.9, 5.3.6 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| powerdns recursor | 5.2.0 ≤ v < 5.2.9, 5.3.0 ≤ v < 5.3.6, 5.4.0 | 5.2.9, 5.3.6 |
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