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Vulnerability Details :

CVE-2026-42885

Summary
Assigner-GitHub_M
Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa
Published At-11 May, 2026 | 19:52
Updated At-11 May, 2026 | 20:22
Rejected At-
Credits

Audiobookshelf: Path prefix bypass in filesystem existence check leaks out-of-scope file existence

Audiobookshelf is a self-hosted audiobook and podcast server. Prior to 2.32.2, the POST /api/filesystem/pathexists endpoint uses String.startsWith() to validate that a resolved file path is within a library folder. This check fails for sibling directories whose names share a common prefix (e.g., /audiobooks vs /audiobooks-private), allowing authenticated users with upload permission to probe file existence outside their authorized library folder boundaries. This vulnerability is fixed in 2.32.2.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:GitHub_M
Assigner Org ID:a0819718-46f1-4df5-94e2-005712e83aaa
Published At:11 May, 2026 | 19:52
Updated At:11 May, 2026 | 20:22
Rejected At:
▼CVE Numbering Authority (CNA)
Audiobookshelf: Path prefix bypass in filesystem existence check leaks out-of-scope file existence

Audiobookshelf is a self-hosted audiobook and podcast server. Prior to 2.32.2, the POST /api/filesystem/pathexists endpoint uses String.startsWith() to validate that a resolved file path is within a library folder. This check fails for sibling directories whose names share a common prefix (e.g., /audiobooks vs /audiobooks-private), allowing authenticated users with upload permission to probe file existence outside their authorized library folder boundaries. This vulnerability is fixed in 2.32.2.

Affected Products
Vendor
advplyr
Product
audiobookshelf
Versions
Affected
  • < 2.33.2
Problem Types
TypeCWE IDDescription
CWECWE-22CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Type: CWE
CWE ID: CWE-22
Description: CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Metrics
VersionBase scoreBase severityVector
3.14.3MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Version: 3.1
Base score: 4.3
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://github.com/advplyr/audiobookshelf/security/advisories/GHSA-rhjg-p6cm-38w2
x_refsource_CONFIRM
Hyperlink: https://github.com/advplyr/audiobookshelf/security/advisories/GHSA-rhjg-p6cm-38w2
Resource:
x_refsource_CONFIRM
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://github.com/advplyr/audiobookshelf/security/advisories/GHSA-rhjg-p6cm-38w2
exploit
Hyperlink: https://github.com/advplyr/audiobookshelf/security/advisories/GHSA-rhjg-p6cm-38w2
Resource:
exploit
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:security-advisories@github.com
Published At:11 May, 2026 | 20:25
Updated At:11 May, 2026 | 21:19

Audiobookshelf is a self-hosted audiobook and podcast server. Prior to 2.32.2, the POST /api/filesystem/pathexists endpoint uses String.startsWith() to validate that a resolved file path is within a library folder. This check fails for sibling directories whose names share a common prefix (e.g., /audiobooks vs /audiobooks-private), allowing authenticated users with upload permission to probe file existence outside their authorized library folder boundaries. This vulnerability is fixed in 2.32.2.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.14.3MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Type: Secondary
Version: 3.1
Base score: 4.3
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CPE Matches

Weaknesses
CWE IDTypeSource
CWE-22Secondarysecurity-advisories@github.com
CWE ID: CWE-22
Type: Secondary
Source: security-advisories@github.com
Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References
HyperlinkSourceResource
https://github.com/advplyr/audiobookshelf/security/advisories/GHSA-rhjg-p6cm-38w2security-advisories@github.com
N/A
https://github.com/advplyr/audiobookshelf/security/advisories/GHSA-rhjg-p6cm-38w2134c704f-9b21-4f2e-91b3-4a467353bcc0
N/A
Hyperlink: https://github.com/advplyr/audiobookshelf/security/advisories/GHSA-rhjg-p6cm-38w2
Source: security-advisories@github.com
Resource: N/A
Hyperlink: https://github.com/advplyr/audiobookshelf/security/advisories/GHSA-rhjg-p6cm-38w2
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Resource: N/A

Change History

0
Information is not available yet

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