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.
History

Tue, 12 May 2026 13:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 11 May 2026 23:00:00 +0000

Type Values Removed Values Added
First Time appeared Advplyr
Advplyr audiobookshelf
Vendors & Products Advplyr
Advplyr audiobookshelf

Mon, 11 May 2026 20:15:00 +0000

Type Values Removed Values Added
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.
Title Audiobookshelf: Memory amplification DoS via oversized compressed details entry in backup upload
Weaknesses CWE-409
References
Metrics cvssV3_1

{'score': 4.9, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-05-11T19:54:10.876Z

Updated: 2026-05-12T12:57:50.120Z

Reserved: 2026-04-30T18:49:06.712Z

Link: CVE-2026-42886

cve-icon Vulnrichment

Updated: 2026-05-12T12:57:42.653Z

cve-icon NVD

Status : Deferred

Published: 2026-05-11T20:25:45.020

Modified: 2026-05-12T14:50:18.527

Link: CVE-2026-42886

cve-icon Redhat

No data.