| Component | Open WebUI |
| Severity | medium (CVSS 5.4) |
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L |
| Published (NVD) | 2026-08-04 |
| Last modified | 2026-09-18 |
| Affected versions | open_webui >= 0.5.0, < 0.11.0 |
| Fixed in | 0.11.0 |
| Weakness | CWE-284CWE-862 |
| CISA KEV | not listed |
NVD description
Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.5.0 until 0.11.0, the standard channel message update and delete handlers accepted any caller holding write access on the channel without checking that the caller wrote the message. Because write access is the same grant a member needs to post, any ordinary participant in a shared standard channel could rewrite or permanently delete another participant message, while group and direct message handlers enforced authorship. 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-2026-70481
- https://github.com/open-webui/open-webui/pull/27197
- https://github.com/open-webui/open-webui/security/advisories/GHSA-mj5r-jf49-m3w7
- https://github.com/open-webui/open-webui/commit/c609ec41154fa092fa0af80d9d365de06b666286
- https://github.com/open-webui/open-webui/releases/tag/v0.11.0
Read more
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