CVE-2026-44561

5.4 MEDIUM

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

Published: 2026-05-15 · Last updated: 2026-05-19

Severity and scoring

CVSS: 5.4 MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
CWE: CWE-863

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 is_user_channel_member function checks whether a ChannelMember row exists but does not check the is_active field. When a user is deactivated from a group or DM channel (removed by the channel owner, or leaves voluntarily), their membership row persists with is_active=False and status='left'. Because the authorization check ignores this field, the deactivated user retains full read and write access to the channel via direct API calls. This vulnerability is fixed in 0.9.0.

Source: NVD

References

[NVD]https://nvd.nist.gov/vuln/detail/CVE-2026-44561
[Vendor advisory]https://github.com/open-webui/open-webui/security/advisories/GHSA-hmgr-67hw-j2cq
[Vendor advisory]https://github.com/open-webui/open-webui/security/advisories/GHSA-hmgr-67hw-j2cq

Related CVEs

Same vendor

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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