CVE-2026-42883 — Audiobookshelf is a self-hosted audiobook and podcast
CVE-2026-42883 — Audiobookshelf is a self-hosted audiobook and podcast server. Prior to 2.32.2, the GET /api/libraries/:id/download endpoint validates that the requesting user has access to the library specified in the URL path, but fetches downloadable items solely by attacker-provided IDs without
What This Means For You
- If your environment is affected by CWE-863, review your exposure and prioritize patching based on your environment. Monitor vendor advisories for CVE-2026-42883 updates and patches.
Related ATT&CK Techniques
🛡️ Detection Rules
3 rules · 6 SIEM formats3 detection rules auto-generated for this incident, mapped to MITRE ATT&CK. Sigma YAML is free — export to any SIEM format via the Intel Bot.
CVE-2026-42883 - Audiobookshelf Library Exfiltration Attempt
title: CVE-2026-42883 - Audiobookshelf Library Exfiltration Attempt
id: scw-2026-05-11-ai-1
status: experimental
level: high
description: |
Detects attempts to access the Audiobookshelf download endpoint with a library ID in the URI. This specific path and method are indicative of an attempt to exploit CVE-2026-42883, where an authenticated user can exfiltrate files from libraries they do not have access to by manipulating the library ID in the download request.
author: SCW Feed Engine (AI-generated)
date: 2026-05-11
references:
- https://shimiscyberworld.com/posts/nvd-CVE-2026-42883/
tags:
- attack.exfiltration
- attack.t1537
logsource:
category: webserver
detection:
selection:
cs-method:
- 'GET'
cs-uri|contains:
- '/api/libraries/'
- '/download'
condition: selection
falsepositives:
- Legitimate administrative activity
Source: Shimi's Cyber World · License & reuse
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-42883 | vulnerability | CVE-2026-42883 |
| CWE-863 | weakness | CWE-863 |
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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