CVE-2026-44423 — ShellHub is a centralized SSH gateway. Prior to 0.24.2, GET

CVE-2026-44423 — ShellHub is a centralized SSH gateway. Prior to 0.24.2, GET

CVE-2026-44423 — ShellHub is a centralized SSH gateway. Prior to 0.24.2, GET /api/sessions/:uid returns the full session object for any authenticated caller, without scoping by the caller's tenant. An authenticated user can read session records (SSH username, device UID, remote IP, terminal type, au

What This Means For You

  • If your environment is affected by CWE-639, review your exposure and prioritize patching based on your environment. Monitor vendor advisories for CVE-2026-44423 updates and patches.

Related ATT&CK Techniques

🛡️ Detection Rules

3 rules · 6 SIEM formats

3 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.

high T1133 Persistence

CVE-2026-44423 - ShellHub Unscoped Session Access

Sigma YAML — free preview
title: CVE-2026-44423 - ShellHub Unscoped Session Access
id: scw-2026-05-13-ai-1
status: experimental
level: high
description: |
  Detects attempts to access session data via the '/api/sessions/:uid' endpoint in ShellHub versions prior to 0.24.2. This vulnerability allows any authenticated user to retrieve session details (like SSH username, device UID, remote IP) from any namespace, indicating potential unauthorized data access.
author: SCW Feed Engine (AI-generated)
date: 2026-05-13
references:
  - https://shimiscyberworld.com/posts/nvd-CVE-2026-44423/
tags:
  - attack.persistence
  - attack.t1133
logsource:
    category: webserver
detection:
  selection:
      cs-method:
          - 'GET'
      uri|startswith:
          - '/api/sessions/'
      cs-uri-query|contains:
          - 'uid='
  condition: selection
falsepositives:
  - Legitimate administrative activity

Source: Shimi's Cyber World · License & reuse

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Indicators of Compromise

IDTypeIndicator
CVE-2026-44423 vulnerability CVE-2026-44423
CWE-639 weakness CWE-639
Source & Attribution
Source PlatformNVD
ChannelNational Vulnerability Database
PublishedMay 14, 2026 at 01:16 UTC

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