CVE-2026-96405
NLnet Labs Unbound up to and including version 1.26.1 limits compression-pointer traversal for each individual domain-name operation but has
CVSS
5.3
Medium
EPSS
—
KEV
—
Exploit Today
0
0-100
Published: Oct 21, 2026 · Last modified: Oct 21, 2026 · CWE-770
Not enough EPSS history yet.
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.