A vulnerability marked as problematic has been reported in MessagePack-CSharp MessagePack for C# up to 2.5.300/3.1.6 . Affected by this vulnerability is an unknown functionality of the component Compressed Data Handler . The manipulation leads to highly compressed data. This vulnerability is referenced as CVE-2026-48510 . Remote exploitation of the attack is possible. No exploit is available. It is suggested to upgrade the affected component.