How severe is CVE-2026-3838?

CVE-2026-3838 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-3838 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-3838?

CVE-2026-3838 affects Unraid. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-3838?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-3838 have an EU (EUVD) identifier?

Yes. CVE-2026-3838 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-12166.

When was CVE-2026-3838 published?

CVE-2026-3838 was published on 2026-03-16 and last updated on 2026-06-17.

CVE-2026-3838

CVE-2026-3838 is a high-severity vulnerability in Unraid with a CVSS 3.x base score of 8.8. 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-22.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 1% (51st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-12166
Weakness: CWE-22
Affected product: Unraid
Published: 2026-03-16
Last modified: 2026-06-17

Description

Unraid Update Request Path Traversal Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Unraid. Authentication is required to exploit this vulnerability. The specific flaw exists within the update.php file. The issue results from the lack of proper validation of a user-supplied path prior to using it in file operations. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-28951.

Frequently asked questions

What is CVE-2026-3838?: Unraid Update Request Path Traversal Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Unraid. Authentication is required to exploit this vulnerability. The specific flaw exists within the update.php file. The issue results from the lack of proper validation of a user-supplied path prior to using it in file operations. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-28951.
How severe is CVE-2026-3838?: CVE-2026-3838 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-3838 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-3838?: CVE-2026-3838 affects Unraid. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-3838?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-3838 have an EU (EUVD) identifier?: Yes. CVE-2026-3838 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-12166.
When was CVE-2026-3838 published?: CVE-2026-3838 was published on 2026-03-16 and last updated on 2026-06-17.

References

https://www.zerodayinitiative.com/advisories/ZDI-26-171/

Affected products (1)

cpe:2.3:o:unraid:unraid:7.2.3:*:*:*:*:*:*:*

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