CVE-2026-96405 — Aggregate DNS name chained pointer decompression work leads to degradation of service.
NLnet Labs Unbound up to and including version 1.26.1 limits compression-pointer traversal for each individual domain-name operation but has no aggregate inbound decompression-w…
Published: 2026-10-21 · CVSS: 5.3 · CVSS 3.1
NLnet Labs Unbound up to and including version 1.26.1 limits compression-pointer traversal for each individual domain-name operation but has no aggregate inbound decompression-work budget. Many chained compression pointers in a message results in a lot of CPU usage following them. A malicious actor with recursive-query access and control of an ordinarily delegated authority that serves specially crafted replies can exploit the vulnerability and degrade Unbound's general performance.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7