CVE-2026-44423 json
ShellHub: Cross-tenant IDOR in `GET /api/sessions/:uid` discloses SSH session data
published 2026-05-06 6 mo ago modified 2026-07-21 3 mo ago also EUVD-2026-30187 , GHSA-9w9c-9w8m-w89q , GO-2026-5302
- cvss
- 6.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 15%
- public exploits
- 0
- none known
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.
Patch / fix
- go github.com/shellhub-io/shellhub 0.24.2
- shellhub shellhub 0.24.2
- govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1
opensuse advisories openSUSE-SU-2026:21483-1
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 5 mo ago
Exploit prediction
0.25% chance of exploitation in the next 30 days, higher than 15% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/shellhub-io/shellhub/security/advisories/GHSA-9w9c-9w8m-w89q referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
| GitHub | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/shellhub-io/shellhub | <0.24.2 |
0.24.2 |
Affected products
- shellhub-io shellhub
Classification
- Weakness
-
- CWE-639 Authorization Bypass Through User-Controlled Key
References
-
github.com
/shellhub-io/shellhub/security/advisories/GHSA-9w9c-9w8m-w89q
exploit, web, vendor-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-44423
advisory
-
github.com
/shellhub-io/shellhub
package
Sources
- CVE List CVE-2026-44423
- GitHub Advisory GHSA-9w9c-9w8m-w89q
- NVD CVE-2026-44423
- OSV GO-2026-5302
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.