CVE-2026-42885: medium-severity vulnerability in advplyr audiobookshelf
Audiobookshelf: Path prefix bypass in filesystem existence check leaks out-of-scope file existence
Published
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 4.3epss 0.3%
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.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Affected products
advplyr · audiobookshelfRelated CVEs — advplyr audiobookshelf
In the same product, most dangerous first.
CVE-2025-25205HIGHRemote Authentication-Bypass can lead to server crash or limited information disclosure due to faulty pattern matchingEPSS 4.8%CVE-2026-71209HIGHaudiobookshelf - %2F Encoding Discrepancy Bypasses Cover/Image Auth Exemption Regex, Enabling Unauthenticated Path TraversalEPSS 2.2%CVE-2024-35236MEDIUMAudiobookshelf Cross-Site-Scripting vulnerability via crafted ebooksEPSS 0.8%CVE-2023-47624HIGHAudiobookshelf Arbitrary File Read VulnerabilityEPSS 0.8%CVE-2023-47619HIGHAudiobookshelf Server-Side Request Forgery and Arbitrary File Read VulnerabilityEPSS 0.6%CVE-2024-43797MEDIUMPath Traversal in audiobookshelfEPSS 0.5%