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    CVE-2026-42886

    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.

    Published:May 11, 2026
    Last Modified:May 12, 2026
    EPS:May 11, 2026
    EPSS Score:0.00037
    CVSS Score:4.9

    Affected Products

    Vendor
    Advplyr
    Product
    Audiobookshelf

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-73085 (CVSS 5.3) — Audiobookshelf is a self-hosted audiobook and podcast server. Prior to 2.36.0, the jwtAuthCheck function in se…
    CVE-2026-71209 (CVSS 7.5) — audiobookshelf's authentication-exemption check (server/routers/Auth.js) matches unauthenticated-allowed GET r…
    CVE-2026-42888 (CVSS 6.9) — Audiobookshelf is a self-hosted audiobook and podcast server. Prior to 2.32.2, the podcast creation endpoint a…
    CVE-2026-42887 (CVSS 4.5) — Audiobookshelf is a self-hosted audiobook and podcast server. Prior to 2.33.0, a stored cross-site scripting (…
    CVE-2026-42885 (CVSS 4.3) — Audiobookshelf is a self-hosted audiobook and podcast server. Prior to 2.32.2, the POST /api/filesystem/pathex…
    CVE-2026-42884 (CVSS 4.3) — Audiobookshelf is a self-hosted audiobook and podcast server. Prior to 2.32.2, the GET /api/collections and GE…
    CVE-2026-42883 (CVSS 6.5) — Audiobookshelf is a self-hosted audiobook and podcast server. Prior to 2.32.2, the GET /api/libraries/:id/down…
    CVE-2026-27974 (CVSS 4.8) — Audiobookshelf is a self-hosted audiobook and podcast server. A cross-site scripting (XSS) vulnerability exist…
    CVE-2026-27963 (CVSS 4.8) — Audiobookshelf is a self-hosted audiobook and podcast server. A stored cross-site scripting (XSS) vulnerabilit…
    CVE-2026-27973 (CVSS 4) — Audiobookshelf is a self-hosted audiobook and podcast server. A stored cross-site scripting (XSS) vulnerabilit…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High