Vulnerability · Published Aug 4, 2026 · Assigned by GitHub_M
CVE-2026-70488Open WebUI: Deletion of directories and file embeddings in other knowledge bases via sync cleanup
Medium 4.3
In plain English
A medium-severity authorization bypass via user-controlled key in open-webui from open-webui. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 31% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.6 until 0.11.0, the sync cleanup endpoint authorized write access to the knowledge base in the URL but then acted on directory and file ids supplied in the request body without checking that those objects belonged to that knowledge base. A user with write access to one knowledge base could delete directories and remove file embeddings from another knowledge base, causing documents to drop out of retrieval results and breaking chat-with-file for targeted documents without disclosing contents. This issue is fixed in 0.11.0.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| PyPI | open-webui | 0.11.0 | GHSA-jxc9-xmc4-gr23 |
| PyPI | open-webui | 0.11.0 | PYSEC-2026-3648 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| open-webui | open-webui | >= 0.9.6, < 0.11.0 |
Weakness: CWE-639, CWE-863 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
References
- https://github.com/open-webui/open-webui/security/advisories/GHSA-jxc9-xmc4-gr23 x_refsource_CONFIRM
- https://github.com/open-webui/open-webui/pull/26722 x_refsource_MISC
- https://github.com/open-webui/open-webui/commit/707efeaed7992dd9896d5928559458f228b9a539 x_refsource_MISC
- https://github.com/open-webui/open-webui/releases/tag/v0.11.0 x_refsource_MISC