CVE-2026-70488 json
Open WebUI: Deletion of directories and file embeddings in other knowledge bases via sync cleanup
published 2026-08-04 3 mo ago modified 2026-09-18 51 d ago also GHSA-jxc9-xmc4-gr23 , PYSEC-2026-3648 , EUVD-2026-52899
- cvss
- 4.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 30%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- pypi open-webui 0.11.0
- openwebui open_webui 0.11.0
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 3 mo ago
Exploit prediction
0.37% chance of exploitation in the next 30 days, higher than 30% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
| GitHub | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
| OSV | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | open-webui | >=0.9.6, <0.11.0 |
0.11.0 |
Affected products
- open-webui open-webui
Classification
References
-
github.com
/open-webui/open-webui/pull/26722
web, patch, vendor-advisory
-
github.com
/open-webui/open-webui/commit/707efeaed7992dd9896d5928559458f228b9a539
web, patch
-
github.com
/open-webui/open-webui/security/advisories/GHSA-jxc9-xmc4-gr23
web, patch, vendor-advisory
-
github.com
/open-webui/open-webui/releases/tag/v0.11.0
web, release-notes
-
github.com
/open-webui/open-webui
package
-
pypi.org
/project/open-webui
package
-
github.com
/advisories/GHSA-jxc9-xmc4-gr23
advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-70488
advisory
Sources
- CVE List CVE-2026-70488
- GitHub Advisory GHSA-jxc9-xmc4-gr23
- NVD CVE-2026-70488
- OSV PYSEC-2026-3648
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.