CVE-2026-33020 | saitoha libsixel up to 1.8.6 SIXEL Encoder sixel_frame_convert_to_rgb888 heap-based overflow

A vulnerability described as critical has been identified in saitoha libsixel up to 1.8.6. Affected is the function sixel_frame_convert_to_rgb888 of the component SIXEL Encoder. The manipulation results in heap-based buffer overflow.

This vulnerability is reported as CVE-2026-33020. The attack can be launched remotely. No exploit exists.

Upgrading the affected component is recommended.VulDB Recent EntriesRead More