CVE-2026-0398: Crafted zones can lead to increased resource usage and crafted CNAME chains can lead to cache poisoning in Recursor.

PriorityP427medium5.3CVSS 3.1

AVNACLPRNUINSUCNINAL

EPSS

0.41%

32.5th percentile

Crafted zones can lead to increased resource usage and crafted CNAME chains can lead to cache poisoning in Recursor.

Affected

5 ranges

Vendor	Product	Version range	Fixed in
debian	pdns-recursor	< pdns-recursor 5.3.5-1 (forky)	pdns-recursor 5.3.5-1 (forky)
powerdns	recursor	>= 5.1.0 < 5.1.10	5.1.10
powerdns	recursor	>= 5.2.0 < 5.2.8	5.2.8
powerdns	recursor	>= 5.2.8 < 5.2.8	5.2.8
powerdns	recursor	>= 5.3.0 < 5.3.5	5.3.5

CVSS provenance

nvdv3.15.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

osv5.3MEDIUM

vendor_debian5.3MEDIUM

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