CVE-2026-44423
ShellHub: Cross-tenant IDOR in `GET /api/sessions/:uid` discloses SSH session data
Description
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.
INFO
Published Date :
May 13, 2026, 10:16 p.m.
Last Modified :
May 15, 2026, 5:16 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | MEDIUM | MITRE-CVE |
Solution
- Update ShellHub to version 0.24.2 or later.
- Apply security patches promptly.
- Restrict access to sensitive session data.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-44423.
| URL | Resource |
|---|---|
| https://github.com/shellhub-io/shellhub/security/advisories/GHSA-9w9c-9w8m-w89q | Exploit Vendor Advisory |
| https://github.com/shellhub-io/shellhub/security/advisories/GHSA-9w9c-9w8m-w89q | Exploit Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-44423 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-44423
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-44423 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-44423 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
May. 15, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:shellhub:shellhub:*:*:*:*:*:*:*:* versions up to (excluding) 0.24.2 Added Reference Type CISA-ADP: https://github.com/shellhub-io/shellhub/security/advisories/GHSA-9w9c-9w8m-w89q Types: Exploit, Vendor Advisory Added Reference Type GitHub, Inc.: https://github.com/shellhub-io/shellhub/security/advisories/GHSA-9w9c-9w8m-w89q Types: Exploit, Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
May. 14, 2026
Action Type Old Value New Value Added Reference https://github.com/shellhub-io/shellhub/security/advisories/GHSA-9w9c-9w8m-w89q -
New CVE Received by [email protected]
May. 13, 2026
Action Type Old Value New Value Added Description 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. Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N Added CWE CWE-639 Added Reference https://github.com/shellhub-io/shellhub/security/advisories/GHSA-9w9c-9w8m-w89q