CVE-2026-88005Open WebUI: Users denied by the OAuth domain allowlist or role policy can still sign in via token exchange
Updated under an hour ago ()
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It affects open-webui and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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Free account, 1 product
Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.8.0 until 0.9.0, Open WebUI's OAuth token exchange endpoint issues a session for a provider access token without applying the email domain allowlist that the normal OAuth login callback enforces. An account whose email domain the login callback would refuse could still obtain a working session through this endpoint. This issue is fixed in version 0.9.0.
- CVSS
- 6.5 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
- Weakness (CWE)
- CWE-863
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Analyzed
- Record last updated
- Sep 15, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
open-webui open-webui open_webui:open_webui (from the name) | from 0.8.0, < 0.9.0 | CNA record |
openwebui open_webui openwebui:open_webui | from 0.8.0 before 0.9.0 | NVD |
References
- https://github.com/open-webui/open-webui/security/advisories/GHSA-4qg5-cxx4-g927x-refsource-confirm, patch, vendor-advisory
- https://github.com/open-webui/open-webui/pull/23639x-refsource-misc, patch
- https://github.com/open-webui/open-webui/commit/fb5ef978bfb451c3f2221931e08e54250cec58cax-refsource-misc, patch
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.