CVE-2026-33257
Fixed in a distro release EPSS <1%CVSS 5.3
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.
Products: powerdns authoritative, powerdns dnsdist, powerdns recursor
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Debian 12 | dnsdist | no fix |
| Debian 12 | pdns | no fix |
| Debian 12 | pdns-recursor | no fix |
| Debian 13 | dnsdist | 1.9.14-0+deb13u1 |
| Debian 13 | pdns | 4.9.14-0+deb13u1 |
| Debian 13 | pdns-recursor | 5.2.9-0+deb13u1 |
| Debian 14 | dnsdist | 2.0.4-1 |
| Debian 14 | pdns | 5.0.4-1 |
| Debian 14 | pdns-recursor | 5.3.0-1 |
| SUSE Linux Enterprise Server 16.0 | dnsdist | 1.9.13-160000.1.1 |
| SUSE Linux Enterprise Server for SAP applications 16.0 | dnsdist | 1.9.13-160000.1.1 |
| Ubuntu 16.04 LTS | dnsdist | no fix |
| Ubuntu 24.04 LTS | pdns | no fix |
| Ubuntu 24.04 LTS | pdns-recursor | no fix |
| Ubuntu 25.10 | dnsdist | no fix |
| Ubuntu 25.10 | pdns | no fix |
| Ubuntu 25.10 | pdns-recursor | no fix |
| Ubuntu 26.04 LTS | dnsdist | no fix |
| Ubuntu 26.04 LTS | pdns | no fix |
| Ubuntu 26.10 | dnsdist | no fix |
| Ubuntu 26.10 | pdns | no fix |
| Ubuntu Pro 16.04 LTS | pdns | no fix |
| Ubuntu Pro 16.04 LTS | pdns-recursor | no fix |
| Ubuntu Pro 18.04 LTS | dnsdist | no fix |
| Ubuntu Pro 18.04 LTS | pdns | no fix |
| Ubuntu Pro 18.04 LTS | pdns-recursor | no fix |
| Ubuntu Pro 20.04 LTS | dnsdist | no fix |
| Ubuntu Pro 20.04 LTS | pdns | no fix |
| Ubuntu Pro 20.04 LTS | pdns-recursor | no fix |
| Ubuntu Pro 22.04 LTS | dnsdist | no fix |
| Ubuntu Pro 22.04 LTS | pdns | no fix |
| Ubuntu Pro 22.04 LTS | pdns-recursor | no fix |
| Ubuntu Pro 24.04 LTS | dnsdist | no fix |
| openSUSE Leap 16.0 | dnsdist | 1.9.13-160000.1.1 |
| openSUSE Tumbleweed | dnsdist | 2.0.5-1.1 |