CVE-2026-42004

CVSS Score & Metrics

Base Score

3.7 / 10

Vector String

                                        CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N                                    

Vulnerability 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.

Vulnerability Details

Published Date

June 25, 2026

Last Modified

June 25, 2026

CWE ID

CWE-115

Source

NVD

Vendor

PowerDNS

Product

DNSdist

External References

https://www.dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2026-09.html

CVSS Score & Metrics

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