CVE-2026-42884Public exploitNetwork attack vector

Restricted library metadata disclosure via unscoped collection queries

Published May 11, 2026 · Updated May 11, 2026

Incorrect authorization in Audiobookshelf before 2.33.2 allows remote authenticated users to read restricted library metadata. CollectionController.findAll calls getOldCollectionsJsonExpanded without a library ID, producing a null query filter, while the per-ID middleware loads collections without checkCanAccessLibrary. Any valid account can retrieve collection names, descriptions, full book metadata, filesystem paths, and item IDs from libraries denied to that account, but not media file contents through these endpoints.

CVSS severity4.3
Medium
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect authorization in Audiobookshelf before 2.33.2 allows remote authenticated users to read restricted library metadata. CollectionController.findAll calls getOldCollectionsJsonExpanded without a library ID, producing a null query filter, while the per-ID middleware loads collections without checkCanAccessLibrary. Any valid account can retrieve collection names, descriptions, full book metadata, filesystem paths, and item IDs from libraries denied to that account, but not media file contents through these endpoints.

The record

CVE
CVE-2026-42884
Published
May 11, 2026
Updated
May 11, 2026
Vendor
advplyr
Product
Audiobookshelf
Classifications
CWE-863, T1213
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 11, 2026CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 2.33.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

advplyr · Audiobookshelfversion=< 2.33.2

Published CVSS scores

4.3GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-863Incorrect Authorization
T1213Data from Information Repositories

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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