CVE-2026-42095 — bookserver in KDE Arianna before 26.04.1 allows attackers

title: CVE-2026-42095 - KDE Arianna bookserver File Read via Socket Guessing
id: scw-2026-04-24-ai-1
status: experimental
level: medium
description: |
  Detects attempts to exploit CVE-2026-42095 by observing web server requests to the '/bookserver/' path that contain directory traversal sequences ('..%2f') and result in a successful response (HTTP 200). This indicates an attacker is likely attempting to read arbitrary files over a socket connection by guessing URLs.
author: SCW Feed Engine (AI-generated)
date: 2026-04-24
references:
  - https://shimiscyberworld.com/posts/nvd-CVE-2026-42095/
tags:
  - attack.initial_access
  - attack.t1190
logsource:
    category: webserver
detection:
  selection:
      cs-uri|startswith:
          - '/bookserver/'
      cs-uri-query|contains:
          - '..%2f'
      sc-status:
          - 200
  condition: selection
falsepositives:
  - Legitimate administrative activity

Source: Shimi's Cyber World · License & reuse