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Vulnerability Details :

CVE-2026-42886

Summary
Assigner-GitHub_M
Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa
Published At-11 May, 2026 | 19:54
Updated At-12 May, 2026 | 12:57
Rejected At-
Credits

Audiobookshelf: Memory amplification DoS via oversized compressed details entry in backup upload

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.

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 | 19:54
Updated At:12 May, 2026 | 12:57
Rejected At:
▼CVE Numbering Authority (CNA)
Audiobookshelf: Memory amplification DoS via oversized compressed details entry in backup upload

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.

Affected Products
Vendor
advplyr
Product
audiobookshelf
Versions
Affected
  • < 2.33.2
Problem Types
TypeCWE IDDescription
CWECWE-409CWE-409: Improper Handling of Highly Compressed Data (Data Amplification)
Type: CWE
CWE ID: CWE-409
Description: CWE-409: Improper Handling of Highly Compressed Data (Data Amplification)
Metrics
VersionBase scoreBase severityVector
3.14.9MEDIUM
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Version: 3.1
Base score: 4.9
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
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-4jq4-rvq8-j26h
x_refsource_CONFIRM
Hyperlink: https://github.com/advplyr/audiobookshelf/security/advisories/GHSA-4jq4-rvq8-j26h
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-4jq4-rvq8-j26h
exploit
Hyperlink: https://github.com/advplyr/audiobookshelf/security/advisories/GHSA-4jq4-rvq8-j26h
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:12 May, 2026 | 14:50

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.

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
Secondary3.14.9MEDIUM
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Type: Secondary
Version: 3.1
Base score: 4.9
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
CPE Matches
Weaknesses
CWE IDTypeSource
CWE-409Secondarysecurity-advisories@github.com
CWE ID: CWE-409
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-4jq4-rvq8-j26hsecurity-advisories@github.com
N/A
https://github.com/advplyr/audiobookshelf/security/advisories/GHSA-4jq4-rvq8-j26h134c704f-9b21-4f2e-91b3-4a467353bcc0
N/A
Hyperlink: https://github.com/advplyr/audiobookshelf/security/advisories/GHSA-4jq4-rvq8-j26h
Source: security-advisories@github.com
Resource: N/A
Hyperlink: https://github.com/advplyr/audiobookshelf/security/advisories/GHSA-4jq4-rvq8-j26h
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Resource: N/A

Change History

0
Information is not available yet

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