What is CVE-2026-44423?

CVE-2026-44423 is a medium-severity vulnerability in Shellhub, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.5/10. Published 2026-05-13.

How severe is CVE-2026-44423?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in Shellhub

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 userna…

Vulnerability class: IDOR (Insecure Direct Object Reference)

EPSS: 0.000 (10.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

Affected products

Shellhub
Shellhub-io Shellhub — versions < 0.24.2

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)

Frequently asked questions

What is CVE-2026-44423?: CVE-2026-44423 is a medium-severity vulnerability in Shellhub, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.5/10. Published 2026-05-13.
How severe is CVE-2026-44423?: Medium severity. CVSS v3 base score is 6.5 out of 10.