| Component | Open WebUI |
| Severity | high (CVSS 7.1) |
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L |
| Published (NVD) | 2026-08-13 |
| Last modified | 2026-09-18 |
| Affected versions | >= 0.9.5, < 0.10.0 read from the advisory text: NVD has not published CPE data yet |
| Fixed in | 0.10.0 |
| Weakness | CWE-862 |
| CISA KEV | not listed |
NVD description
Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.5 before 0.10.0, any authenticated user can overwrite the content of a message in a channel they do not belong to (including private and DM channels) by sending a chat completion request with a channel:-prefixed chat_id and a target message_id. The channel: path routes pipeline output through _make_channel_emitter, which writes to the Messages table using the caller-supplied message_id without binding it to the channel. This issue is fixed in version 0.10.0.
What to do
- Upgrade Open WebUI to
0.10.0or later. - Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
- NVD: CVE-2026-59714
- https://github.com/open-webui/open-webui/commit/ac3449cac91e62b08a7c28e54fcd044d14dea791
- https://github.com/open-webui/open-webui/pull/26385
- https://github.com/open-webui/open-webui/releases/tag/v0.10.0
- https://github.com/open-webui/open-webui/security/advisories/GHSA-x2ff-v5v8-m75m
Read more
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