---
id: CVE-2026-0396
title: >-
  An attacker might be able to inject HTML content into the internal web
  dashboard by sending crafted DNS queries to a DNSdist instance where
  domain-based dynamic rules have been enabled via either
  DynBlockRulesGroup:setSuffixMatchRule or …
summary: >-
  An attacker might be able to inject HTML content into the internal web
  dashboard by sending crafted DNS queries to a DNSdist instance where
  domain-based dynamic rules have been enabled via either
  DynBlockRulesGroup:setSuffixMatchRule or …
severity: low
cvss: 3.1
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N'
cwe:
  - CWE-80
vendor: powerdns
product: dnsdist
affected:
  - 'dnsdist >= 1.9.0, < 1.9.12'
  - 'dnsdist >= 2.0.0, < 2.0.3'
patched:
  - dnsdist 2.0.3
published: '2026-03-31'
updated: '2026-07-25'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-0396'
references:
  - url: >-
      https://www.dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2026-02.html
    label: security@open-xchange.com
tags:
  - nvd
epss: 0.00136
epssPercentile: 0.03404
ingestedAt: '2026-07-25T10:53:53.092Z'
---

## Overview

An attacker might be able to inject HTML content into the internal web dashboard by sending crafted DNS queries to a DNSdist instance where domain-based dynamic rules have been enabled via either DynBlockRulesGroup:setSuffixMatchRule or DynBlockRulesGroup:setSuffixMatchRuleFFI.

## Affected

- `dnsdist >= 1.9.0, < 1.9.12`
- `dnsdist >= 2.0.0, < 2.0.3`

## Remediation

Upgrade past the affected range:

- `dnsdist 2.0.3`