CVE-2026-44426: ShellHub is a centralized SSH gateway

Q: How do I fix CVE-2026-44426?

shellhub: upgrade to 0.24.2. Exact commands for each OS are on this page.

Q: Is CVE-2026-44426 being exploited?

CVE-2026-44426 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-44426 affect?

CVE-2026-44426 affects shellhub. Severity is medium (CVSS 6.5). 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 A

Q: How urgent is CVE-2026-44426?

Priority 34/100. Public exploit reference

Routine

MEDIUM 6.5UPGRADE

CVE-2026-44426 is a medium-severity flaw (CVSS 6.5) affecting shellhub. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 API Key, for any tenant, regardless of the API Key's own tenant scope. The handler conditionally skips the membership check when the user ID (X-ID) is absent, which is exactly the case for API Key authentication

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 77%)
CISA exploited list	No
Weakness	CWE-639
Published	2026-05-13
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: shellhub

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-13 22:16 UTCPublished CVE record published
2026-06-17 10:50 UTCUpdated Record last modified

shellhub shellhub UPGRADE

Affected: < 0.24.2

Fixed in: 0.24.2

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy shellhub || rpm -q shellhub || shellhub --version

2. UPGRADE to 0.24.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade shellhub

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade shellhub

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-44426?

shellhub: upgrade to 0.24.2. Exact commands for each OS are on this page.

Is CVE-2026-44426 being exploited?

CVE-2026-44426 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-44426 affect?

CVE-2026-44426 affects shellhub. Severity is medium (CVSS 6.5). 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 A

How urgent is CVE-2026-44426?

Priority 34/100. Public exploit reference

Related CVEs

CVE-2026-44425 MEDIUM 5.4 UPGRADE ShellHub is a centralized SSH gateway
CVE-2026-44424 MEDIUM 6.5 UPGRADE ShellHub is a centralized SSH gateway
CVE-2026-44423 MEDIUM 6.5 UPGRADE ShellHub is a centralized SSH gateway

References

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