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Medium 5.0Published Apr 22, 2026
CVE-2026-33259Concurrent modification of RPZ data can lead to denial of servce
Updated under an hour ago ()
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It affects PowerDNS Recursor. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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
- 5.0 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:H
- Weakness (CWE)
- CWE-416
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- OX
- NVD analysis
- Analyzed
- Record last updated
- Apr 22, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
PowerDNS Recursor powerdns:recursor (from the name) | from 5.4.0 before 5.4.1; from 5.3.0 before 5.3.6; from 5.2.0 before 5.2.9 | CNA record |
powerdns recursor powerdns:recursor | from 5.2.0 before 5.2.9; from 5.3.0 before 5.3.6; 5.4.0 | NVD |
References
- https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-powerdns-2026-03.htmlbroken-link, vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.