CVE-2026-52684 — Prefetch Feature Allows Persistent Ghost Domain Cache Poisoning Attack

CVE-2026-52684

Prefetch Feature Allows Persistent Ghost Domain Cache Poisoning Attack PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
PowerDNS / Recursor	affected 0.0.0 before 5.5.0

CWE

No CWE identifiers supplied.

References

https://github.com/PowerDNS/pdns/pull/17748

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.