What is CVE-2026-44426?

CVE-2026-44426 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-2026-44426?

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

Auth bypass in Shellhub

CVE-2026-44426

ShellHub is a centralized SSH gateway. Prior to 0.24.2, GET /api/namespaces/:tenant returns the full namespace object — including the members list (user IDs, e-mails, roles), settings, and device counts — to any caller authenticated by an…

Vulnerability class: IDOR (Insecure Direct Object Reference)

EPSS: 0.000 (11.8th 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-2026-44426?: CVE-2026-44426 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-2026-44426?: Medium severity. CVSS v3 base score is 6.5 out of 10.