CVE-2026-42886: medium-severity vulnerability in advplyr audiobookshelf
Audiobookshelf: Memory amplification DoS via oversized compressed details entry in backup upload
Published · Updated
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 4.9epss 0.3%
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.
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Affected products
advplyr · audiobookshelfRelated CVEs — advplyr audiobookshelf
In the same product, most dangerous first.
CVE-2025-25205HIGHRemote Authentication-Bypass can lead to server crash or limited information disclosure due to faulty pattern matchingEPSS 4.8%CVE-2026-71209HIGHaudiobookshelf - %2F Encoding Discrepancy Bypasses Cover/Image Auth Exemption Regex, Enabling Unauthenticated Path TraversalEPSS 2.2%CVE-2024-35236MEDIUMAudiobookshelf Cross-Site-Scripting vulnerability via crafted ebooksEPSS 0.8%CVE-2023-47624HIGHAudiobookshelf Arbitrary File Read VulnerabilityEPSS 0.8%CVE-2023-47619HIGHAudiobookshelf Server-Side Request Forgery and Arbitrary File Read VulnerabilityEPSS 0.6%CVE-2024-43797MEDIUMPath Traversal in audiobookshelfEPSS 0.5%