High 8.1Published May 15, 2026

CVE-2026-45675Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline.

Updated under an hour ago (2026-10-19 08:23 UTC)

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It affects openwebui open_webui. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for openwebui open_webui

Exploited in the last 30 days

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, the LDAP and OAuth authentication flows use a TOCTOU (Time-of-Check-Time-of-Use) pattern for first-user admin role assignment. The regular signup handler (signup_handler in auths.py, line 663) was explicitly patched to prevent this race with the comment "Insert with default role first to avoid TOCTOU race", but the LDAP and OAuth code paths were never updated with the same fix. This vulnerability is fixed in 0.9.0.

CVSS: 8.1 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-269, CWE-362
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Modified
Record last updated: Jun 18, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

openwebui open_webui openwebui:open_webui	before 0.9.0	NVD

References

https://github.com/open-webui/open-webui/commit/96a0b3239b1aadb23fc359bf10849c9ba12fd6ecpatch
https://github.com/open-webui/open-webui/pull/23626issue-tracking
https://github.com/open-webui/open-webui/security/advisories/GHSA-h3ww-q6xx-w7x3exploit, mitigation, vendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.