CVE-2026-33258

MEDIUM

Crafted zones can cause increased resource usage

Title source: cna
STIX 2.1

Description

By publishing and querying a crafted zone an attacker can cause allocation of large entries in the negative and aggressive NSEC(3) caches.

References (1)

Scores

CVSS v3 5.3
EPSS 0.0000
EPSS Percentile 0.1%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-770
Status published
Products (5)
powerdns/recursor 5.4.0
PowerDNS/Recursor 5.2.0 - 5.2.9
powerdns/recursor 5.2.0 - 5.2.9
PowerDNS/Recursor 5.3.0 - 5.3.6
PowerDNS/Recursor 5.4.0 - 5.4.1
Published Apr 22, 2026
Tracked Since Apr 22, 2026