There is 1 open security issue in bullseye.
1 issue left for the package maintainer to handle:
xterm before 375 allows code execution via font ops, e.g., because an OSC 50 response may have Ctrl-g and therefore lead to command execution within the vi line-editing mode of Zsh. NOTE: font ops are not allowed in the xterm default configurations of some Linux distributions.
You can find information about how to handle this issue in the security team's documentation.