How severe is CVE-2026-0766?

CVE-2026-0766 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-2026-0766 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 27% (98th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-0766?

CVE-2026-0766 affects Openwebui Open Webui. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-0766?

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-2026-0766 have an EU (EUVD) identifier?

Yes. CVE-2026-0766 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-4471.

When was CVE-2026-0766 published?

CVE-2026-0766 was published on 2026-01-23 and last updated on 2026-06-17.

CVE-2026-0766

CVE-2026-0766 is a high-severity vulnerability in Openwebui Open Webui with a CVSS 3.x base score of 8.8. Its EPSS exploit-prediction score of 27% places it in the 98th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-94.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 27% (98th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-4471
Weakness: CWE-94
Affected product: Openwebui Open Webui
Published: 2026-01-23
Last modified: 2026-06-17

Description

Open WebUI load_tool_module_by_id Command Injection Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Open WebUI. Authentication is required to exploit this vulnerability. The specific flaw exists within the load_tool_module_by_id function. The issue results from the lack of proper validation of a user-supplied string before using it to execute Python code. An attacker can leverage this vulnerability to execute code in the context of the service account. Was ZDI-CAN-28257.

Frequently asked questions

What is CVE-2026-0766?: Open WebUI load_tool_module_by_id Command Injection Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Open WebUI. Authentication is required to exploit this vulnerability. The specific flaw exists within the load_tool_module_by_id function. The issue results from the lack of proper validation of a user-supplied string before using it to execute Python code. An attacker can leverage this vulnerability to execute code in the context of the service account. Was ZDI-CAN-28257.
How severe is CVE-2026-0766?: CVE-2026-0766 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-2026-0766 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 27% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-0766?: CVE-2026-0766 affects Openwebui Open Webui. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-0766?: 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-2026-0766 have an EU (EUVD) identifier?: Yes. CVE-2026-0766 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-4471.
When was CVE-2026-0766 published?: CVE-2026-0766 was published on 2026-01-23 and last updated on 2026-06-17.

References

https://www.zerodayinitiative.com/advisories/ZDI-26-032/

Affected products (1)

cpe:2.3:a:openwebui:open_webui:0.6.32:*:*:*:*:*:*:*

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