CVE-2026-82720

A flaw was found in Unbound. When compiled with DNS-over-HTTPs DoH support, a use-after-free vulnerability exists in the DoH stream cleanup code. A remote malicious actor can exploit this by sending a specially crafted DoH connection under specific failure conditions, such as an RPZ drop query or...

CVE-2026-82720

NLnet Labs Unbound 1.12.0 up to and including 1.26.0 has a use-after-free vulnerability when compiled for DNS-over-HTTPs support with '--with-libnghttp2'. During failure code paths i.e., RPZ drop query, jostle due to heavy traffic, a dropped DoH stream brings down the whole DoH session and does n...

CVE-2026-82720

NLnet Labs Unbound versions 1.12.0 through 1.26.0 contain a use-after-free vulnerability in the DNS-over-HTTPs (DoH) code path when compiled with --with-libnghttp2. During failure code paths (e.g., RPZ drop query or jostle due to heavy traffic), a dropped DoH stream tears down the entire DoH sess...