CVE-2026-44426: medium-severity vulnerability in shellhub-io shellhub
ShellHub: Cross-tenant IDOR in `GET /api/namespaces/:tenant` via API Key bypasses membership check
Published · Updated
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6.5epss 0.3%
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.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Affected products
shellhub-io · shellhubRelated CVEs — shellhub-io shellhub
In the same product, most dangerous first.
CVE-2026-44425MEDIUMShellHub: Crash-DoS via field injection in filter and sort-by parametersEPSS 0.3%CVE-2026-44423MEDIUMShellHub: Cross-tenant IDOR in `GET /api/sessions/:uid` discloses SSH session dataEPSS 0.2%CVE-2026-44424MEDIUMShellHub: Cross-tenant IDOR in `GET /api/devices/:uid` discloses device data of any namespaceEPSS 0.2%