Vulnerability · Published May 11, 2026 · Assigned by GitHub_M
CVE-2026-42883Audiobookshelf: Cross-library file exfiltration via unscoped bulk download endpoint
Medium 6.5
In plain English
A medium-severity incorrect authorization in audiobookshelf from advplyr. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 17% of all known vulnerabilities).
Official description
Audiobookshelf is a self-hosted audiobook and podcast server. Prior to 2.32.2, the GET /api/libraries/:id/download endpoint validates that the requesting user has access to the library specified in the URL path, but fetches downloadable items solely by attacker-provided IDs without constraining them to that library. An authenticated user with download permission and access to any one library can exfiltrate the full file contents of items belonging to any other library, including libraries they are explicitly denied access to. This vulnerability is fixed in 2.32.2.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| advplyr | audiobookshelf | < 2.32.2 |
Weakness: CWE-863 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N