CVE-2026-33258
Crafted zones can cause increased resource usage
CVSS Score
5.3
EPSS Score
0.0%
EPSS Percentile
0th
By publishing and querying a crafted zone an attacker can cause allocation of large entries in the negative and aggressive NSEC(3) caches.
| Vendor | powerdns |
| Product | recursor |
| Published | Apr 22, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low
Affected Versions
PowerDNS / Recursor
5.4.0 < 5.4.1 5.3.0 < 5.3.6 5.2.0 < 5.2.9
References
Credits
Haruto Kimura (Stella)