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MEDIUM · 5.0

CVE-2026-33259

Having many concurrent transfers of the same RPZ can lead to inconsistent RPZ data, use after free and/or a crash of the recursor. Normally concurrent transfers of the same RPZ zone can only occur wit...

Vulnerability Description

Having many concurrent transfers of the same RPZ can lead to inconsistent RPZ data, use after free and/or a crash of the recursor. Normally concurrent transfers of the same RPZ zone can only occur with a malfunctioning RPZ provider.

CVSS Score

5.0

MEDIUM

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:H
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
HIGH

Affected Products

VendorProductVersions
PowerdnsRecursor>= 5.2.0, < 5.2.9

Related Weaknesses (CWE)

CWE-416

References

FAQ

What is CVE-2026-33259?

CVE-2026-33259 is a vulnerability with a CVSS score of 5.0 (MEDIUM). Having many concurrent transfers of the same RPZ can lead to inconsistent RPZ data, use after free and/or a crash of the recursor. Normally concurrent transfers of the same RPZ zone can only occur wit...

How severe is CVE-2026-33259?

CVE-2026-33259 has been rated MEDIUM with a CVSS base score of 5.0/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-33259?

Check the references section above for vendor advisories and patch information. Affected products include: Powerdns Recursor.