CVE-2026-88006 json
Open WebUI: Users denied by the OAuth role policy can still sign in via token exchange
published 2026-09-10 59 d ago modified 2026-10-01 38 d ago also GHSA-wvm9-9g5j-623f , PYSEC-2026-4129 , EUVD-2026-75541
- cvss
- 6.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 31%
- public exploits
- 0
- none known
Summary
Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.8.0 until 0.11.1, Open WebUI's OAuth token exchange endpoint issues a session for a provider access token without running the OAuth role management that the normal OAuth login callback runs. A user whose provider roles the login callback would refuse, or would demote, could still obtain a working session at their existing role through this endpoint. This issue is fixed in version 0.11.1.
Patch / fix
- pypi open-webui 0.11.1
- openwebui open_webui 0.11.1
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 59 d ago
Exploit prediction
0.37% chance of exploitation in the next 30 days, higher than 31% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N |
| GitHub | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N |
| OSV | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | open-webui | >=0.8.0, <0.11.1 |
0.11.1 |
Affected products
- open-webui open-webui
Classification
- Weakness
-
- CWE-863 Incorrect Authorization
References
-
github.com
/open-webui/open-webui/commit/d799e81edbdc971c6deb096b6474cd95b93504bf
web, patch
-
github.com
/open-webui/open-webui/security/advisories/GHSA-wvm9-9g5j-623f
web, patch
-
github.com
/open-webui/open-webui/releases/tag/v0.11.1
web, release-notes
-
nvd.nist.gov
/vuln/detail/CVE-2026-88006
advisory
-
github.com
/open-webui/open-webui
package
-
pypi.org
/project/open-webui
package
-
github.com
/advisories/GHSA-wvm9-9g5j-623f
advisory
Sources
- CVE List CVE-2026-88006
- GitHub Advisory GHSA-wvm9-9g5j-623f
- NVD CVE-2026-88006
- OSV PYSEC-2026-4129
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