CVE-2026-42389
Medium
Description
This fix provides extra hardening for the 5.4.x branch by doing extra validation of incoming answers from authoritative servers.
SeverityMedium
CVSS5.3
Exploit probability—
ProductRecursor
PublishedJun 25, 2026
First seenJun 25, 2026
Weakness typeCWE-20Improper input validation
How to fix
Update
- PowerDNS Recursor5.4.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| PowerDNS Recursor | 5.4.0 ≤ v < 5.4.3 | 5.4.3 |
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