Vulnerability in Powerdns Dnsdist
CVE-2026-42004
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 d…
CVSS v3 metric
CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N.
Affected products
- Powerdns Dnsdist — versions 1.9.0, 2.0.0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-42004?
- CVE-2026-42004 is a low-severity vulnerability in Powerdns Dnsdist, classified under CWE-115. CVSS score: 3.7/10. Published 2026-06-25.
- How severe is CVE-2026-42004?
- Low severity. CVSS v3 base score is 3.7 out of 10.