How severe is CVE-2026-44423?

CVE-2026-44423 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-2026-44423 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-44423?

CVE-2026-44423 affects Shellhub. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-44423?

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

Does CVE-2026-44423 have an EU (EUVD) identifier?

Yes. CVE-2026-44423 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30187.

When was CVE-2026-44423 published?

CVE-2026-44423 was published on 2026-05-13 and last updated on 2026-06-17.

CVE-2026-44423

CVE-2026-44423 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% (16th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-30187
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/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.

Frequently asked questions

What is 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 username, device UID, remote IP, terminal type, authenticated flag, timestamps) belonging to any other namespace. This vulnerability is fixed in 0.24.2.
How severe is CVE-2026-44423?: CVE-2026-44423 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-2026-44423 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-44423?: CVE-2026-44423 affects Shellhub. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-44423?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-44423 have an EU (EUVD) identifier?: Yes. CVE-2026-44423 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30187.
When was CVE-2026-44423 published?: CVE-2026-44423 was published on 2026-05-13 and last updated on 2026-06-17.

References

https://github.com/shellhub-io/shellhub/security/advisories/GHSA-9w9c-9w8m-w89q

Affected products (1)

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

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