CVE-2026-5958 | GNU sed up to 4.9 open_next_file toctou

A vulnerability described as problematic has been identified in GNU sed up to 4.9. This affects the function open_next_file. Executing a manipulation can lead to time-of-check time-of-use.

This vulnerability is registered as CVE-2026-5958. The attack needs to be launched locally. No exploit is available.

Upgrading the affected component is recommended.