CVE-2026-44423

Name: CVE-2026-44423
Creator: NVD / NIST
Published: 2026-05-13T22:16:44.103+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.25%

Last modified Jun 17, 2026

CVE-2026-44423 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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. EPSS estimates a 0.25% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

0.25%

15.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-639

Affected Software

Vendor	Product	Versions
Shellhub	Shellhub	< 0.24.2

References

https://github.com/shellhub-io/shellhub/security/advisories/GHSA-9w9c-9w8m-w89qExploit, Vendor Advisory
https://github.com/shellhub-io/shellhub/security/advisories/GHSA-9w9c-9w8m-w89qExploit, Vendor Advisory

Timeline

Published: May 13, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-44423?

How severe is CVE-2026-44423?

CVE-2026-44423 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.25% probability of exploitation in the next 30 days.

How do I fix CVE-2026-44423?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-44423?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST