CVE-2026-71209: Advplyr Audiobookshelf

High severity, CVSS 7.5. EPSS: 1.9% chance of exploitation in the next 30 days.

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.

Affected products

• Advplyr Audiobookshelf: from 2.19.1, up to and including 2.35.1

Published 2026-08-05. Last modified 2026-08-26.