Nghttp2 · Nghttp2 · CVE-2026-24029
**Name of the Vulnerable Software and Affected Versions**
versions prior to the fix for CVE-2026-24029
**Description**
When the `early acl drop` (or `earlyACLDrop` in Lua) option is disabled, and a DNS over HTTPs frontend is utilizing the nghttp2 provider, the Access Control List (ACL) check is bypassed. This allows all clients to submit DNS over HTTPS (DoH) queries, irrespective of the configured ACL rules. The default setting for `early acl drop` is enabled.
**Recommendations**
Ensure the `early acl drop` option is enabled.