---
id: CVE-2026-24029
title: >-
  When the early_acl_drop (earlyACLDrop in Lua) option is disabled (default is
  enabled) on a DNS over HTTPs frontend using the nghttp2 provider, the ACL
  check is skipped, allowing all clients to send DoH queries regardless of the
  configure…
summary: >-
  When the early_acl_drop (earlyACLDrop in Lua) option is disabled (default is
  enabled) on a DNS over HTTPs frontend using the nghttp2 provider, the ACL
  check is skipped, allowing all clients to send DoH queries regardless of the
  configure…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N'
cwe:
  - CWE-863
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-2026-24029'
references:
  - url: >-
      https://www.dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2026-02.html
    label: security@open-xchange.com
tags:
  - nvd
epss: 0.00148
epssPercentile: 0.03354
ingestedAt: '2026-07-25T10:53:53.200Z'
---

## Overview

When the early_acl_drop (earlyACLDrop in Lua) option is disabled (default is enabled) on a DNS over HTTPs frontend using the nghttp2 provider, the ACL check is skipped, allowing all clients to send DoH queries regardless of the configured ACL.

## 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`