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CVE-2026-45395

Openwebui Open Webui privilege escalation

7.2 HIGHPublic exploitEPSS 0.66%
  1. Published15 May 2026

Description

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.5, the tool update endpoint (POST /api/v1/tools/id/{id}/update) is missing the workspace.tools permission check that is present on the tool create endpoint. This allows a user who has been explicitly denied tool management capabilities ( and who the administrator considers untrusted for code execution ) to replace a tool's server-side Python content and trigger execution, bypassing the intended workspace.tools security boundary. This vulnerability is fixed in 0.9.5.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredHigh
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Affected products

Openwebui Open Webui< 0.9.5

Remediation

Fixed in
Openwebui Open Webui≥ 0.9.5

References

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Frequently asked

Is CVE-2026-45395 being actively exploited?

CVE-2026-45395 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.66%.

How severe is CVE-2026-45395?

CVE-2026-45395 has a CVSS 3.1 base score of 7.2, rated high. EPSS estimates a 0.66% probability of exploitation.

Which products are affected by CVE-2026-45395?

Affected products include Openwebui Open Webui.

How do I fix CVE-2026-45395?

Upgrade affected software to a fixed version, for example Openwebui Open Webui 0.9.5 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-45395 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.