Detections
Analytics
CVE-2026-42004
low
Description
An attacker can send a crafted EDNS OPT record that will be ignored by DNSdist’s filtering rules, but will be rewritten as a valid OPT record when EDNS Client Subnet is inserted, causing the backend to see the EDNS option(s) that DNSdist did not filter.
References
https://www.dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2026-09.html