Is CVE-2026-12545 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-12545?

CVE-2026-12545 has a CVSS v3 severity of MEDIUM (6.7).

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CVE-2026-12545

Description

A flaw was found in rubygem-hammer_cli. A command injection vulnerability exists in Hammer CLI and the Railties (Ruby on Rails) component distributed with Satellite due to the insecure interpolation of the $EDITOR environment variable into the Ruby system() method. By passing a single interpolated string to system(), the application invokes a system shell (/bin/sh) that interprets shell metacharacters (e.g., ;, |, &).