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A command injection vulnerability, CVE-2026-58459, exists in the gpsprof utility of gpsd through version 3.27.5, allowing an attacker to exploit this by controlling the GPS device subtype value and embedding backtick payloads within the gnuplot plot title, which leads to arbitrary shell command execution as the user running gnuplot when a victim renders a generated plot via the gpsprof and gnuplot workflow due to improper escaping.