Vulnerability · Published Mar 31, 2026 · Assigned by OX
CVE-2026-24029DNS over HTTPS ACL bypass
Medium 6.5
In plain English
A medium-severity incorrect authorization in DNSdist from PowerDNS. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 5% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.2%top 95.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.23 | dnsdist | 2.0.4-r0 | ALPINE-CVE-2026-24029 |
| Alpine:v3.24 | dnsdist | 2.0.4-r0 | ALPINE-CVE-2026-24029 |
| Debian:12 | dnsdist | no fix listed | DEBIAN-CVE-2026-24029 |
| Debian:13 | dnsdist | 1.9.14-0+deb13u1 | DEBIAN-CVE-2026-24029 |
| Debian:14 | dnsdist | 2.0.3-1 | DEBIAN-CVE-2026-24029 |
| Ubuntu:25.10 | dnsdist | no fix listed | UBUNTU-CVE-2026-24029 |
| Ubuntu:26.04:LTS | dnsdist | no fix listed | UBUNTU-CVE-2026-24029 |
| Ubuntu:26.10 | dnsdist | no fix listed | UBUNTU-CVE-2026-24029 |
Affected products (as reported)
Weakness: CWE-863 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N