CVE-2026-45626: Getarcaneapp Arcane

Medium severity, CVSS 6.3. EPSS: 0.4% chance of exploitation in the next 30 days.

Arcane is an interface for managing Docker containers, images, networks, and volumes. In 1.18.1 and earlier, GET /environments/{id}/volumes/{volumeName}/browse accepts a path query parameter that is passed to a shell command (sh -c "find … | while …") inside an Arcane helper container. The path sanitiser blocks ../ traversal but does not strip Bourne-shell metacharacters such as $() or backticks, and strconv.Quote only escapes Go string metacharacters, not shell substitution sequences. Any authenticated user with access to a browseable volume can execute arbitrary commands inside the helper container; command output is reflected back in the 500 error body.

Affected products

• Getarcaneapp Arcane: up to and including 1.18.1

Published 2026-05-29. Last modified 2026-07-21.