CVE-2026-44552

8.7 HIGH

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

Published: 2026-05-15 · Last updated: 2026-05-18

Severity and scoring

CVSS: 8.7 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N
CWE: CWE-668

Affected products

Vendor	Product
openwebui	open_webui

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.

Source: NVD

References

[NVD]https://nvd.nist.gov/vuln/detail/CVE-2026-44552
[Vendor advisory]https://github.com/open-webui/open-webui/security/advisories/GHSA-3x8w-4f7p-xxc2

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CVE-2026-45667 — Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline (6.5 MEDIUM)
CVE-2026-45666 — Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline (6.5 MEDIUM)
CVE-2026-45665 — Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline (8.1 HIGH)
CVE-2026-45365 — Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline (5.4 MEDIUM)
CVE-2026-45351 — Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline (6.5 MEDIUM)

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