CVE-2026-100866

onefetch through 2.28.1 writes repository information field values to the terminal without removing control characters, allowing terminal escape sequence injection. Attackers can embed ANSI/OSC escape sequences in project manifest version and name fields to manipulate terminal output, rewrite window titles, hide text, or trigger emulator-specific behavior when victims run onefetch.

  • Published Sep 27, 2026
  • CVSS 4.8 medium
  • 0.1% chance of exploitation in the next 30 days (EPSS)

Affected software

CVE-2026-100866 at the National Vulnerability Database