CVE-2026-52684
published 2026-07-23CVE-2026-52684: 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…
PriorityP415low3.7CVSS 3.1
AVNACHPRNUINSUCNILAN
EPSS
0.14%
4.0th percentile
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
1 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| powerdns | recursor | >= 0.0.0 < 5.5.0 | 5.5.0 |
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No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-52684 pdns-recursor: prefetch feature allows persistent ghost domain cache poisoning attack [fedora-all]
bugzilla·2026-07-24·CVSS 3.7
CVE-2026-52684 [LOW] CVE-2026-52684 pdns-recursor: prefetch feature allows persistent ghost domain cache poisoning attack [fedora-all]
CVE-2026-52684 pdns-recursor: prefetch feature allows persistent ghost domain cache poisoning attack [fedora-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
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.
Bugzilla
CVE-2026-52684 pdns-recursor: prefetch feature allows persistent ghost domain cache poisoning attack [epel-all]
bugzilla·2026-07-24·CVSS 3.7
CVE-2026-52684 [LOW] CVE-2026-52684 pdns-recursor: prefetch feature allows persistent ghost domain cache poisoning attack [epel-all]
CVE-2026-52684 pdns-recursor: prefetch feature allows persistent ghost domain cache poisoning attack [epel-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
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.
Bugzilla
CVE-2026-52684 pdns-recursor: prefetch feature allows persistent ghost domain cache poisoning attack
bugzilla·2026-07-23·CVSS 3.7
CVE-2026-52684 [LOW] CVE-2026-52684 pdns-recursor: prefetch feature allows persistent ghost domain cache poisoning attack
CVE-2026-52684 pdns-recursor: prefetch feature allows persistent ghost domain cache poisoning attack
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.
2026-07-23
Published