CVE-2026-33257
Insufficient input validation of internal webserver
CVSS Score
5.3
EPSS Score
0.0%
EPSS Percentile
0th
An attacker can send a web request that causes unlimited memory allocation in the internal web server, leading to a denial of service. The internal web server is disabled by default.
| Vendor | powerdns |
| Product | authoritative |
| Published | Apr 22, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low
Affected Versions
PowerDNS / Authoritative
5.0.0 < 5.0.4 4.9.0 < 4.9.14
PowerDNS / DNSdist
1.9.0 < 1.9.13 2.0.0 < 2.0.4
PowerDNS / Recursor
5.4.0 < 5.4.1 5.3.0 < 5.3.6 5.2.0 < 5.2.9
References
docs.powerdns.com: https://docs.powerdns.com/authoritative/security-advisories/powerdns-advisory-2026-05.html dnsdist.org: https://www.dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2026-04.html docs.powerdns.com: https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-powerdns-2026-03.html
Credits
Vitaly Simonovich