| Name | CVE-2026-33260 |
| Description | 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. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DSA-6233-1, DSA-6234-1, DSA-6235-1 |
| Debian Bugs | 1135373 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| dnsdist (PTS) | bullseye | 1.5.1-3 | vulnerable |
| bookworm | 1.7.3-2 | vulnerable |
| trixie | 1.9.10-1+deb13u1 | vulnerable |
| trixie (security) | 1.9.14-0+deb13u1 | fixed |
| forky, sid | 2.0.5-1 | fixed |
| pdns (PTS) | bullseye | 4.4.1-1 | vulnerable |
| bookworm | 4.7.3-2 | vulnerable |
| trixie | 4.9.7-1 | vulnerable |
| trixie (security) | 4.9.14-0+deb13u1 | fixed |
| forky, sid | 5.0.3-1 | vulnerable |
| pdns-recursor (PTS) | bullseye | 4.4.2-3 | vulnerable |
| bookworm, bookworm (security) | 4.8.8-1+deb12u1 | vulnerable |
| trixie | 5.2.8-0+deb13u1 | vulnerable |
| trixie (security) | 5.2.9-0+deb13u1 | fixed |
| forky, sid | 5.4.1-1 | fixed |
The information below is based on the following data on fixed versions.
Notes
[bookworm] - dnsdist <end-of-life> (See #1119290)
[bullseye] - dnsdist <end-of-life> (see #1119290)
[bookworm] - pdns-recursor <end-of-life> (see DSA 6045)
[bullseye] - pdns-recursor <end-of-life> (see DSA 6045)
[bookworm] - pdns <end-of-life> (See #1119290)
[bullseye] - pdns <end-of-life> (see DLA 4471)
https://www.dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2026-04.html#cve-2026-33260-insufficient-input-validation-of-internal-webserver
https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2026-03.html#cve-2026-33260-insufficient-input-validation-of-internal-web-server
According to the advisory affects only PowerDNS Recursor up to and including 5.2.8,
Mark the first version in unstable after 5.2.9 as the fixed version.
https://docs.powerdns.com/authoritative/security-advisories/powerdns-advisory-2026-05.html