What is CVE-2026-42883?

CVE-2026-42883 is a medium-severity vulnerability in Advplyr Audiobookshelf, classified under Incorrect Authorization. CVSS score: 6.5/10. Published 2026-05-11.

How severe is CVE-2026-42883?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in Advplyr Audiobookshelf

CVE-2026-42883

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 it…

Vulnerability class: Broken Access Control

EPSS: 0.000 (9.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

Affected products

Advplyr Audiobookshelf — versions < 2.32.2

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-42883?: CVE-2026-42883 is a medium-severity vulnerability in Advplyr Audiobookshelf, classified under Incorrect Authorization. CVSS score: 6.5/10. Published 2026-05-11.
How severe is CVE-2026-42883?: Medium severity. CVSS v3 base score is 6.5 out of 10.