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…
CVE-2026-33259 · Severity: medium · CVSS 5 · Published 2026-04-22
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.
No. Junglewise Threat Intelligence has no report of CVE-2026-33259 being exploited in the wild.
How severe is CVE-2026-33259?
Medium severity, with a CVSS score of 5, published 22 April 2026.
Which products and versions are affected?
Powerdns Recursor. The advisory does not name versions.
Is there a fix for CVE-2026-33259?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
Am I affected by CVE-2026-33259?
Check whether you run Powerdns Recursor. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.