ShellHub: Cross-tenant IDOR in `GET /api/sessions/:uid` discloses SSH session data
Priority MEDIUM 62CWE-639Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-639.
Summary
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, authenticated flag, timestamps) belonging to any other namespace. This vulnerability is fixed in 0.24.2.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00246 15th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed shellhub (shellhub-io): 0.24.2github.com/shellhub-io/shellhub (Go): 0.24.2
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| shellhub-io | shellhub | before 0.24.2 | 0.24.2 | Patch available | CNA |
| — | github.com/shellhub-io/shellhub (Go) | before 0.24.2 | 0.24.2 | Patch available | GHSA-9w9c-9w8m-w89q |
- shellhub Vendorshellhub-io Affected before 0.24.2 Fixed in 0.24.2 Patch available CNA
- github.com/shellhub-io/shellhub (Go) Vendor— Affected before 0.24.2 Fixed in 0.24.2 Patch available GHSA-9w9c-9w8m-w89q
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:shellhub:shellhub:*:*:*:*:*:*:*:* | before 0.24.2 | Vulnerable | shellhub-io |
- cpe:2.3:a:shellhub:shellhub:*:*:*:*:*:*:*:* Versions before 0.24.2 Vulnerable ·shellhub-io
Remediation
- Fix · CNA shellhub (shellhub-io) Fixed in 0.24.2
- Fix · GHSA-9w9c-9w8m-w89q github.com/shellhub-io/shellhub (Go) Fixed in 0.24.2 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-44423
- 2026-10-03 Alias added: GHSA-9w9c-9w8m-w89q
References
More shellhub-io Shellhub vulnerabilities
- TI-2026-32367 ShellHub: Cross-tenant IDOR in `GET /api/namespaces/:tenant` via API Key bypasses membership check CVSS 3.1MEDIUM 6.5
- TI-2026-32365 ShellHub: Cross-tenant IDOR in `GET /api/devices/:uid` discloses device data of any namespace CVSS 3.1MEDIUM 6.5
- TI-2026-32366 ShellHub: Crash-DoS via field injection in filter and sort-by parameters CVSS 3.1MEDIUM 5.4
Sources
- CVE-2026-44423 · CVE Program
- CVE-2026-44423 · NVD
- FIRST EPSS
- GHSA-9w9c-9w8m-w89q · GitHub Advisory Database · CC BY 4.0
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