CVE Catalog

CVE-2026-70488

MediumCVSS 4.3
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.21%

12th percentile - higher than 12% of all known CVEs

Summary

Open WebUI from 0.9.6 to 0.11.0 has a vulnerability in the sync cleanup endpoint that authorizes write access to a knowledge base in the URL but acts on directory and file ids from the request body without checking ownership. A user with write access to one knowledge base can delete directories and remove file embeddings from another knowledge base. Fixed in 0.11.0.

Risk Assessment

An attacker can disrupt other knowledge bases by deleting data, potentially leading to loss of information availability and integrity.

Recommendation

Update Open WebUI to version 0.11.0 or later.

Other vulnerabilities in Open WebUI

See all
Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS