Medium
ShellHub: Cross-tenant IDOR in `GET /api/namespaces/:tenant` via API Key bypasses membership check
Type: advisorySources: OSV
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.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-44426
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 4 Nov 2026, 17:18 UTC · Revision 1
Source evidence
ShellHub: Cross-tenant IDOR in `GET /api/namespaces/:tenant` via API Key bypasses membership check
core-osv · Original sourcePublished 13 May 2026, 21:06 UTC
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.
osv:CVE-2026-44426
Complete source record
{
"id": "25e29417079676d42a4721a62c2f8dcbb060566223f006a4410f194acdbd5078",
"url": "https://osv.dev/vulnerability/CVE-2026-44426",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "ShellHub: Cross-tenant IDOR in `GET /api/namespaces/:tenant` via API Key bypasses membership check",
"summary": "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.",
"evidence": "osv:CVE-2026-44426",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2026-44426",
"aliases": [
"CVE-2026-44426",
"GHSA-vwx9-7qcf-gg7f",
"GO-2026-5680"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/shellhub-io/shellhub",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "2e5002fff1b1ef5f6c86557065ce9fda3c2579f4"
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"database_specific": {
"extracted_events": [
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{
"fixed": "0.24.2"
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],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"cpe": "cpe:2.3:a:shellhub:shellhub:*:*:*:*:*:*:*:*",
"range": [
{
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{
"fixed": "0.24.2"
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"source": "CPE_RANGE"
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}
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"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-44426.json"
}
}
],
"modified": "2026-10-28T02:30:38.041737790Z",
"provider": "osv",
"references": [
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44426.json",
"https://github.com/shellhub-io/shellhub/security/advisories/GHSA-vwx9-7qcf-gg7f",
"https://nvd.nist.gov/vuln/detail/CVE-2026-44426"
],
"provider_metadata": {
"cwe_ids": [
"CWE-639"
],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44426.json"
}
},
"related_cves": [
{
"value": "CVE-2026-44426",
"evidence": "/id"
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"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 505245,
"published_at": "2026-05-13T21:06:06.222+00:00"
}