CVE-2026-71209: high-severity vulnerability in advplyr audiobookshelf
audiobookshelf - %2F Encoding Discrepancy Bypasses Cover/Image Auth Exemption Regex, Enabling Unauthenticated Path Traversal
Published · Updated
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36Vexday Risk Score
Patch soon. It has a working public exploit.
ssvc Attendcvss 7.5epss 2.2%
audiobookshelf's authentication-exemption check (server/routers/Auth.js) matches unauthenticated-allowed GET routes against req.path via a regex requiring a literal /items/:id/cover or /authors/:id/image shape, where req.path retains %2F sequences URL-encoded. CacheManager.handleCoverCache then joins this decoded value into a cache file path and streams the result before any database-backed ownership check.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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-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%CVE-2026-73085MEDIUMAudiobookshelf: Refresh Token Accepted on Resource EndpointsEPSS 0.5%