CVE-2026-24029
MediumCVSS 6.5Exploitation Probability (EPSS)
Low risk5th percentile - higher than 5% of all known CVEs
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 configured ACL.
Risk Assessment
Unauthorized clients can use the DoH server to send DNS queries, potentially leading to data leakage or server resource abuse.
Recommendation
It is recommended to enable the early_acl_drop (or earlyACLDrop) option on the DoH frontend and ensure ACLs are properly configured and enforced.
Original NVD description (English source)
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.