CVE-2026-42886

Published: May 11, 2026Modified: Jun 17, 2026Deferred

4.9

Vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

Exploitability: 1.2 / Impact: 3.6

Source: security-advisories@github.com (Secondary)

Description

Audiobookshelf is a self-hosted audiobook and podcast server. Prior to 2.32.2, the POST /api/backups/upload endpoint decompresses the details entry from an uploaded .audiobookshelf ZIP file entirely into memory using zip.entryData(), with no limit on the decompressed size. The upload middleware also has no file size limit. An admin user can upload a crafted ZIP containing a highly compressed details entry that, when decompressed, consumes hundreds of megabytes or gigabytes of memory, crashing the server process via out-of-memory. This vulnerability is fixed in 2.32.2.

Related CWEs

CWE-409

Improper Handling of Highly Compressed Data (Data Amplification)

The product does not handle or incorrectly handles a compressed input with a very high compression ratio that produces a large output.

References (2)

https://github.com/advplyr/audiobookshelf/security/advisories/GHSA-4jq4-rvq8-j26h

Source: security-advisories@github.com

https://github.com/advplyr/audiobookshelf/security/advisories/GHSA-4jq4-rvq8-j26h

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

Timeline

No history available yet.