CVE-2026-44426: CWE-639: Authorization Bypass Through User-Controlled Key in shellhub-io shellhub
ShellHub is a centralized SSH gateway. Prior to 0.24.2, GET /api/namespaces/:tenant returns the full namespace object — including the members list (user IDs, e-mails, roles), settings, and device counts — to any caller authenticated by an API Key, for any tenant, regardless of the API Key's own tenant scope. The handler conditionally skips the membership check when the user ID (X-ID) is absent, which is exactly the case for API Key authentication. This vulnerability is fixed in 0.24.2.
AI Analysis
Technical Summary
ShellHub, a centralized SSH gateway, had an authorization bypass vulnerability (CVE-2026-44426) in versions before 0.24.2. The GET /api/namespaces/:tenant endpoint returned the entire namespace object, including members list (user IDs, emails, roles), settings, and device counts, to any API Key authenticated caller without verifying the tenant scope. The handler skipped membership checks when the user ID (X-ID) header was missing, which occurs during API Key authentication, allowing unauthorized access to tenant data. This vulnerability is classified under CWE-639 (Authorization Bypass Through User-Controlled Key) and has a CVSS 3.1 score of 6.5 (medium severity). The issue is resolved in version 0.24.2.
Potential Impact
An attacker with an API Key but limited tenant scope could retrieve sensitive information about other tenants, including user IDs, emails, roles, settings, and device counts. This unauthorized data disclosure impacts confidentiality but does not affect integrity or availability. There are no known exploits in the wild at this time.
Mitigation Recommendations
This vulnerability is fixed in shellhub version 0.24.2. Users should upgrade to version 0.24.2 or later to remediate this issue. No other official remediation or temporary fixes are documented. Patch status is not explicitly stated beyond the fix in 0.24.2, so users should verify with the vendor for the latest guidance.
CVE-2026-44426: CWE-639: Authorization Bypass Through User-Controlled Key in shellhub-io shellhub
Description
ShellHub is a centralized SSH gateway. Prior to 0.24.2, GET /api/namespaces/:tenant returns the full namespace object — including the members list (user IDs, e-mails, roles), settings, and device counts — to any caller authenticated by an API Key, for any tenant, regardless of the API Key's own tenant scope. The handler conditionally skips the membership check when the user ID (X-ID) is absent, which is exactly the case for API Key authentication. This vulnerability is fixed in 0.24.2.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
ShellHub, a centralized SSH gateway, had an authorization bypass vulnerability (CVE-2026-44426) in versions before 0.24.2. The GET /api/namespaces/:tenant endpoint returned the entire namespace object, including members list (user IDs, emails, roles), settings, and device counts, to any API Key authenticated caller without verifying the tenant scope. The handler skipped membership checks when the user ID (X-ID) header was missing, which occurs during API Key authentication, allowing unauthorized access to tenant data. This vulnerability is classified under CWE-639 (Authorization Bypass Through User-Controlled Key) and has a CVSS 3.1 score of 6.5 (medium severity). The issue is resolved in version 0.24.2.
Potential Impact
An attacker with an API Key but limited tenant scope could retrieve sensitive information about other tenants, including user IDs, emails, roles, settings, and device counts. This unauthorized data disclosure impacts confidentiality but does not affect integrity or availability. There are no known exploits in the wild at this time.
Mitigation Recommendations
This vulnerability is fixed in shellhub version 0.24.2. Users should upgrade to version 0.24.2 or later to remediate this issue. No other official remediation or temporary fixes are documented. Patch status is not explicitly stated beyond the fix in 0.24.2, so users should verify with the vendor for the latest guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-05-06T14:40:00.953Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a04f25dcbff5d8610127f52
Added to database: 5/13/2026, 9:51:25 PM
Last enriched: 5/13/2026, 10:07:24 PM
Last updated: 5/14/2026, 2:10:36 AM
Views: 4
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