How severe is CVE-2026-44426?

CVE-2026-44426 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-44426 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-44426?

CVE-2026-44426 affects Shellhub. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-44426?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-44426 have an EU (EUVD) identifier?

Yes. CVE-2026-44426 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30190.

When was CVE-2026-44426 published?

CVE-2026-44426 was published on 2026-05-13 and last updated on 2026-06-17.

CVE-2026-44426

CVE-2026-44426 is a medium-severity vulnerability in Shellhub with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-639.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (23rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-30190
Weakness: CWE-639
Affected product: Shellhub
Published: 2026-05-13
Last modified: 2026-06-17

Description

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. This vulnerability is fixed in 0.24.2.

Frequently asked questions

What is 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 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. This vulnerability is fixed in 0.24.2.
How severe is CVE-2026-44426?: CVE-2026-44426 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-44426 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-44426?: CVE-2026-44426 affects Shellhub. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-44426?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-44426 have an EU (EUVD) identifier?: Yes. CVE-2026-44426 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30190.
When was CVE-2026-44426 published?: CVE-2026-44426 was published on 2026-05-13 and last updated on 2026-06-17.

References

https://github.com/shellhub-io/shellhub/security/advisories/GHSA-vwx9-7qcf-gg7f

Affected products (1)

cpe:2.3:a:shellhub:shellhub:*:*:*:*:*:*:*:*

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