| Name | CVE-2026-42005 |
| 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-6367-1, DSA-6368-1, DSA-6369-1 |
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 (security), trixie | 1.9.15-0+deb13u1 | fixed |
| forky, sid | 2.1.0-2 | fixed |
| pdns (PTS) | bullseye | 4.4.1-1 | vulnerable |
| bookworm | 4.7.3-2 | vulnerable |
| trixie (security), trixie | 4.9.16-0+deb13u1 | fixed |
| forky, sid | 5.1.3-1 | fixed |
| pdns-recursor (PTS) | bullseye | 4.4.2-3 | vulnerable |
| bookworm, bookworm (security) | 4.8.8-1+deb12u1 | vulnerable |
| trixie (security), trixie | 5.2.11-0+deb13u1 | fixed |
| forky, sid | 5.4.3-1 | fixed |
The information below is based on the following data on fixed versions.
Notes
[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)
[bookworm] - dnsdist <end-of-life> (See #1119290)
[bullseye] - dnsdist <end-of-life> (see #1119290)
https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2026-08.html#cve-2026-42005-unbounded-resource-consumption-in-internal-webserver
Only affects pdns-rec 5.2.x, marking first 5.3 upload as fixed version
https://doc.powerdns.com/authoritative/security-advisories/powerdns-advisory-2026-07.html
https://github.com/PowerDNS/pdns/commit/11e4f2da8259e5070e7a193f48d23ade38b71dc0
https://www.dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2026-09.html#cve-2026-42005-insufficient-input-validation-of-internal-web-server