CVE-2026-49943 | CZ.NIC BIRD up to 2.19.0 Expressions nest/a-path.c as_path_match stack-based overflow (EUVD-2026-33980)
A vulnerability was found in CZ.NIC BIRD up to 2.19.0. It has been declared as critical. Impacted is the function as_path_match of the file nest/a-path.c of the component Expressions Handler. The manipulation results in stack-based buffer overflow.
This vulnerability is known as CVE-2026-49943. It is possible to launch the attack remotely. No exploit is available.
It is recommended to upgrade the affected component.