CVE-2026-42886 — Audiobookshelf is a self-hosted audiobook and podcast
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 uploa
What This Means For You
- If your environment is affected by CWE-409, review your exposure and prioritize patching based on your environment. Monitor vendor advisories for CVE-2026-42886 updates and patches.
Related ATT&CK Techniques
🛡️ Detection Rules
1 rule · 6 SIEM formats1 detection rule auto-generated for this incident, mapped to MITRE ATT&CK. Sigma YAML is free — export to any SIEM format via the Intel Bot.
CVE-2026-42886 - Audiobookshelf Backup Upload Denial of Service
title: CVE-2026-42886 - Audiobookshelf Backup Upload Denial of Service
id: scw-2026-05-11-ai-1
status: experimental
level: medium
description: |
Detects the specific API endpoint used in the CVE-2026-42886 vulnerability. An authenticated administrator uploading a crafted ZIP file to this endpoint can trigger a denial-of-service condition by exhausting server memory. This rule specifically targets the vulnerable POST request to '/api/backups/upload'.
author: SCW Feed Engine (AI-generated)
date: 2026-05-11
references:
- https://shimiscyberworld.com/posts/nvd-CVE-2026-42886/
tags:
- attack.impact
- attack.t1499
logsource:
category: webserver
detection:
selection:
cs-method:
- 'POST'
cs-uri:
- '/api/backups/upload'
condition: selection
falsepositives:
- Legitimate administrative activity
Source: Shimi's Cyber World · License & reuse
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-42886 | vulnerability | CVE-2026-42886 |
| CWE-409 | weakness | CWE-409 |
Written by SCW Vulnerability Desk
Source & Attribution
| Source Platform | NVD |
| Channel | National Vulnerability Database |
| Published | May 11, 2026 at 23:25 UTC |
This content was curated and summarized by Shimi's Cyber World for informational purposes. It is not copied or republished in full. All intellectual property rights remain with the original author and source.
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