We released PowerDNS DNSdist 1.9.9 today, an emergency release fixing a security issue tracked as CVE-2025-30194 where a remote, unauthenticated attacker can cause a denial of service via a crafted DNS over HTTPS connection. The issue was reported to us via our public GitHub tracker, so once it was clear that the issue had a security impact we prepared to release a new version as soon as possible.
While we advise upgrading to a fixed version, a work-around is to temporarily switch to the h2o provider until DNSdist has been upgraded.
Please see the DNSdist website for the changelog and the current documentation.
Please send us all feedback and issues you might have via the mailing list, or in case of a bug, via GitHub.
The release tarball and its signature are available on the downloads website, and packages for several distributions are available from our repository.
