CVE-2020-27347: Tmux Project Tmux

High severity, CVSS 7.8. EPSS: 0.7% chance of exploitation in the next 30 days.

In tmux before version 3.1c the function input_csi_dispatch_sgr_colon() in file input.c contained a stack-based buffer-overflow that can be exploited by terminal output.

Affected products

• Tmux Project Tmux: from 2.9, up to and including 3.1b

Published 2020-11-06. Last modified 2026-06-17.