drakkan/sftpgo · Security
SFTPGo improperly sanitizes placeholders in group home directories/key prefixes
- GHSA ID
- GHSA-m83q-5wr4-4gfp
- CVE ID
- CVE-2026-30915
- Severity
- medium
- Published
- Updated
- CVSS v4
- 6.9 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
Description
Impact
SFTPGo versions before v2.7.1 contain an input validation issue in the handling of dynamic group paths, for example, home directories or key prefixes.
When a group is configured with a dynamic home directory or key prefix using placeholders like %username%, the value replacing the placeholder is not strictly sanitized against relative path components. Consequently, if a user is created with a specially crafted username the resulting path may resolve to a parent directory instead of the intended sub-directory.
Patches
This issue is fixed in version v2.7.1
CWEs
- CWE-20 · Improper Input Validation
- CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')