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CVE-2026-44552

8.7 · HIGH

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline.

Published May 15, 2026openwebuiCWE-668EPSS 0.30%

Overview

CVE-2026-44552 is a high-severity vulnerability affecting openwebui open_webui. It was published on May 15, 2026 and has a CVSS 3.1 base score of 8.7 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.7, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, the tool_servers and terminal_servers keys in utils/tools.py do use a prefix. When two or more Open WebUI instances share a Redis database (a supported and documented deployment pattern, e.g., for multi-region deployments, blue-green setups, or cluster topologies), the unprefixed keys collide. An admin on Instance A writing to tool_servers overwrites the value read by Instance B — causing Instance B's users to receive Instance A's tool server configuration. This vulnerability is fixed in 0.9.0.

Remediation

Check the references section for vendor advisories and patches from openwebui. Update open_webui to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
openwebuiopen_webui>= 0, < 0.9.0Affected

References

GitHubgithub.com/open-webui/open-webui/security/advisories/GHSA-3x8w-4f7p-xxc2

How CyberStrike helps

Frequently asked questions

What is CVE-2026-44552?

CVE-2026-44552 is a high-severity vulnerability affecting openwebui open_webui. It was published on May 15, 2026 and has a CVSS 3.1 base score of 8.7 (HIGH).

How severe is CVE-2026-44552?

This vulnerability has a CVSS 3.1 base score of 8.7, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-44552?

Check the references section for vendor advisories and patches from openwebui. Update open_webui to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-44552?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-44552 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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