CVE-2026-44423

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.

CVSS v3.1 Score

6.5

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS — Exploit Prediction

0.0003

Probability of exploitation

0.10%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-639 CWE-639

Affected Products

Vendor	Product	Versions
shellhub	shellhub	< 0.24.2

References

Advisories & Patches

https://github.com/shellhub-io/shellhub/security/advisories/GHSA-9w9c-9w8m-w89q https://github.com/shellhub-io/shellhub/security/advisories/GHSA-9w9c-9w8m-w89q

Exploits

https://github.com/shellhub-io/shellhub/security/advisories/GHSA-9w9c-9w8m-w89q https://github.com/shellhub-io/shellhub/security/advisories/GHSA-9w9c-9w8m-w89q

Frequently Asked Questions

What is CVE-2026-44423? +

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. It has a CVSS v3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2026-44423? +

CVE-2026-44423 has a CVSS v3.1 score of 6.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0003, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-44423? +

CVE-2026-44423 affects products from shellhub, specifically: shellhub. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-44423? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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