CVE-2026-33261

MEDIUM

Null pointer accces in aggressive NSEC(3) cache

Title source: CVE List
STIX 2.1 vulnerability

Record summary

CVE-2026-33261 has a selected CVSS score of 5.9 (medium).

Description

A zone transition from NSEC to NSEC3 might trigger an internal inconsistency and cause a denial of service.

Description source: CVE List

Exploitation context

CISA SSVC decision

ExploitationNone
AutomatableNo
Technical impactPartial

CISA Coordinator · SSVC 2.0.3 · Evaluated Apr 22, 2026 · Source: CVE List

Affected products and versions

1
ProductSourceVersion range

Recursor

Browse PowerDNS / Recursorpdns-recursor

Default status: unaffected

CVE List5.4.0 to < 5.4.1affected
5.3.0 to < 5.3.6affected
5.2.0 to < 5.2.9affected

References

2