CVE-2026-42004

Published: Jun 25, 2026Modified: Jun 25, 2026Deferred

3.7

Vector

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

Exploitability: 2.2 / Impact: 1.4

Source: security@open-xchange.com (Secondary)

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.

Related CWEs

CWE-115

Misinterpretation of Input

The product misinterprets an input, whether from an attacker or another product, in a security-relevant fashion.

References (1)

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

Source: security@open-xchange.com

Timeline

No history available yet.