CVE-2026-45626: Arcane Backend: OS Command Injection in Volume Browser ListDirectory via path query parameter

May 18, 2026 (updated June 9, 2026)

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.

References

github.com/advisories/GHSA-9mvm-4gwg-v8mp
github.com/getarcaneapp/arcane/security/advisories/GHSA-9mvm-4gwg-v8mp
nvd.nist.gov/vuln/detail/CVE-2026-45626

Code Behaviors & Features

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