| Component | Open WebUI |
| Severity | medium (CVSS 5.3) |
| CVSS vector | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N |
| Published (NVD) | 2026-08-04 |
| Last modified | 2026-09-18 |
| Affected versions | open_webui >= 0.8.8, < 0.11.0 |
| Fixed in | 0.11.0 |
| Weakness | CWE-862 |
| CISA KEV | not listed |
NVD description
Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.8.8 until 0.11.0, inline direct model metadata accepted client-supplied knowledge attachments without filtering them against the caller's read access. Any authenticated user who knew another user's file id could have the builtin knowledge tools return indexed chunks from that file, causing a read-only cross-user confidentiality loss while leaving knowledge-base permissions and saved workspace model validation unaffected. This issue is fixed in 0.11.0.
What to do
- Upgrade Open WebUI to
0.11.0or later. - Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
- NVD: CVE-2026-70487
- https://github.com/open-webui/open-webui/security/advisories/GHSA-6xhv-rxhv-pwm4
- https://github.com/open-webui/open-webui/commit/305880f2e2aeb2dda2f4b2a18a20bdcd558f7134
- https://github.com/open-webui/open-webui/releases/tag/v0.11.0
Read more
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