CVE-2026-70488Open WebUI: Deletion of directories and file embeddings in other knowledge bases via sync cleanup
Updated under an hour ago ()
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It affects open-webui and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 4.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
- Weakness (CWE)
- CWE-639, CWE-863
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Analyzed
- Record last updated
- Aug 5, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
open-webui open-webui open_webui:open_webui (from the name) | from 0.9.6, < 0.11.0 | CNA record |
openwebui open_webui openwebui:open_webui | from 0.9.6 before 0.11.0 | NVD |
References
- https://github.com/open-webui/open-webui/security/advisories/GHSA-jxc9-xmc4-gr23x-refsource-confirm, patch, vendor-advisory
- https://github.com/open-webui/open-webui/pull/26722x-refsource-misc, patch, vendor-advisory
- https://github.com/open-webui/open-webui/commit/707efeaed7992dd9896d5928559458f228b9a539x-refsource-misc, patch
- https://github.com/open-webui/open-webui/releases/tag/v0.11.0x-refsource-misc, release-notes
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.