What’s Vulnerable › Vulnerabilities
CVE-2026-24029: DNS over HTTPS ACL bypass
- Severity: medium (CVSS 6.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.1% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-03-31 · updated 2026-07-25
- Weakness: CWE-863
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 products
- PowerDNS DNSdist: from 1.9.0 before 1.9.12; from 2.0.0 before 2.0.3 — fixed in 1.9.12, 2.0.3
How to fix
Upgrade to a fixed version: PowerDNS DNSdist 1.9.12, 2.0.3. Check the vendor advisory for mitigations.
References
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