What is CVE-2026-42885?

CVE-2026-42885 is a medium-severity vulnerability in Advplyr Audiobookshelf, classified under Path Traversal. CVSS score: 4.3/10. Published 2026-05-11.

How severe is CVE-2026-42885?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Path Traversal in Advplyr Audiobookshelf

CVE-2026-42885

Audiobookshelf is a self-hosted audiobook and podcast server. Prior to 2.32.2, the POST /api/filesystem/pathexists endpoint uses String.startsWith() to validate that a resolved file path is within a library folder. This check fails for sib…

Vulnerability class: Path Traversal (Directory Traversal)

EPSS: 0.000 (12.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

Affected products

Advplyr Audiobookshelf — versions < 2.33.2

Weakness classification (CWE)

CWE-22 — Path Traversal

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-42885?: CVE-2026-42885 is a medium-severity vulnerability in Advplyr Audiobookshelf, classified under Path Traversal. CVSS score: 4.3/10. Published 2026-05-11.
How severe is CVE-2026-42885?: Medium severity. CVSS v3 base score is 4.3 out of 10.