CVE-2026-88006 json
Open WebUI: Users denied by the OAuth role policy can still sign in via token exchange
published 2mo ago modified last mo. also EUVD-2026-75541 , GHSA-wvm9-9g5j-623f , PYSEC-2026-4129
- 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
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Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 2mo ago
Exploit prediction
0.37% chance of exploitation in the next 30 days, higher than 31% of all scored CVEs (FIRST EPSS, 2026-11-11).
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
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.