CVE-2026-33258

Crafted zones can cause increased resource usage

State: Published
Severity: 5.3 Medium
Published: Apr 22, 2026
Updated: Apr 22, 2026
Reserved: Mar 18, 2026

Description

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

Scores

CVSS	Score	Vector	Source
3.1	5.3 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L	OX

Weaknesses

CWE-770 Allocation of Resources Without Limits or Throttling

Affected Products

Product	Versions
RecursorPowerDNS	5.4.0 to before 5.4.1Affected 5.3.0 to before 5.3.6Affected 5.2.0 to before 5.2.9Affected

References

https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-powerdns-2026-03.html

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