CVE-2026-52684
Low
Description
If the auth responds very slowly and the records expire in between, the capping of TTLs is not enforced for lack of data. This does not happen on regular resolve as then then the child records are used immediately if not expired and thus valid, or the records are expired, and in that case not used. So this case can only happen if almost expired records are used to refresh the authoritative NS records.
SeverityLow
CVSS3.7
Exploit probability—
ProductRecursor
PublishedJul 23, 2026
First seenJul 23, 2026
How to fix
Update
- PowerDNS Recursor5.5.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| PowerDNS Recursor | v < 5.5.0 | 5.5.0 |
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