CVE-2026-42885
Audiobookshelf: Path prefix bypass in filesystem existence check leaks out-of-scope file existence
CVSS Score
4.3
EPSS Score
0.0%
EPSS Percentile
0th
Audiobookshelf is a self-hosted audiobook and podcast server. Prior to 2.32.2, the POST /api/filesystem/pathexists endpoint uses String.startsWith() to validate that a resolved file path is within a library folder. This check fails for sibling directories whose names share a common prefix (e.g., /audiobooks vs /audiobooks-private), allowing authenticated users with upload permission to probe file existence outside their authorized library folder boundaries. This vulnerability is fixed in 2.32.2.
| CWE | CWE-22 |
| Vendor | advplyr |
| Product | audiobookshelf |
| Published | May 11, 2026 |
| Last Updated | May 11, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None
Affected Versions
advplyr / audiobookshelf
< 2.33.2