CVE-2026-42001 Insufficient Validation of Autoprimary SOA Queries
Attackers can cause denial of service in PowerDNS Authoritative by exploiting insufficient validation in Autoprimary SOA queries.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-42001?
CVE-2026-42001 is a high-severity denial of service vulnerability in PowerDNS Authoritative, published on 21 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Insufficient Validation of Autoprimary SOA Queries
Weakness: CWE-400
Which versions are affected by CVE-2026-42001?
It affects 1 product.
Products include Powerdns Authoritative.
How do I fix CVE-2026-42001?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-42001 being exploited?
There is no known exploitation of CVE-2026-42001 in the wild and no public exploit code.
Other vulnerabilities in PowerDNS Authoritative
Sources
Also known as DEBIAN-CVE-2026-42001, GHSA-mxqj-8r4c-fp83, UBUNTU-CVE-2026-42001.