CVE

CVE-2026-71209

7.5

CVSShigh

Exploitable remotely over the internet · no authentication required.

Description

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.

Attack Vector

Network

Privileges Req.

None

User Interaction

None

audiobookshelf

Updated Sep 18, 2026View on NVD →

S4E scanner

highMisconfiguration~10 seconds

Audiobookshelf - Authentication Bypass

Audiobookshelf contains a path traversal caused by improper authentication-exemption check on URL-encoded paths in server/routers/Auth.js, letting unauthenticated attackers read arbitrary files, exploit requires crafted URL with encoded traversal sequences. References: https://github.com/advplyr/audiobookshelf/security/advisories/GHSA-pg8v-5jcv-wrvw https://nvd.nist.gov/vuln/detail/CVE-2026-71209 Remediation: Update to the latest version with proper decoding and authentication checks for path parameters.

Used 2.3k times · domain, subdomain, ipv4

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CVE history: audiobookshelf

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