CVE-2026-81634 | NLnet Labs Unbound up to 1.26.0 RRSet Canonicalisation heap-based overflow

September 16, 2026 Yanac

A vulnerability, which was classified as critical, has been found in NLnet Labs Unbound up to 1.26.0. Affected by this vulnerability is an unknown functionality of the component RRSet Canonicalisation. The manipulation leads to heap-based buffer overflow.

This vulnerability is documented as CVE-2026-81634. The attack can be initiated remotely. There is not any exploit available.

It is advisable to upgrade the affected component.VulDB Recent EntriesRead More