CVE-2026-90770

Spug through 3.4.0 contains a remote code execution vulnerability in the ping_check function that interpolates user-supplied monitor addresses directly into shell commands without validation. Authenticated users with monitor permissions can inject shell metacharacters via the /monitor/run_test/ endpoint to execute arbitrary commands as the Spug process user.

  • Published Sep 13, 2026
  • CVSS 8.7 high
  • 1.3% chance of exploitation in the next 30 days (EPSS)
  • A fix is available

Affected software

CVE-2026-90770 at the National Vulnerability Database