{"cve":"CVE-2026-70488","nvd":{"published":"2026-08-04T21:16:37.623","modified":"2026-09-18T14:57:29.663","status":"Analyzed","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","score":4.3},"cwes":["CWE-639","CWE-863"],"references":["https://github.com/open-webui/open-webui/commit/707efeaed7992dd9896d5928559458f228b9a539","https://github.com/open-webui/open-webui/pull/26722","https://github.com/open-webui/open-webui/releases/tag/v0.11.0","https://github.com/open-webui/open-webui/security/advisories/GHSA-jxc9-xmc4-gr23"],"products":["openwebui:open_webui"],"source":"nvd","synced_at":"2026-10-19T22:47:10.050265369+00:00"},"epss":{"cve":"CVE-2026-70488","score":0.00366,"percentile":0.30427,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-jxc9-xmc4-gr23","url":"https://osv.dev/vulnerability/GHSA-jxc9-xmc4-gr23","summary":"Open WebUI: Deletion of directories and file embeddings in other knowledge bases via sync cleanup","modified":"2026-08-10T11:40:37.039288391Z","packages":[{"ecosystem":"PyPI","name":"open-webui","purl":"pkg:pypi/open-webui","ranges":[">=0.9.6 <0.11.0"],"fixed":["0.11.0"]}]},{"id":"PYSEC-2026-3648","url":"https://osv.dev/vulnerability/PYSEC-2026-3648","summary":"Open WebUI: Deletion of directories and file embeddings in other knowledge bases via sync cleanup","modified":"2026-08-10T11:30:10.486381414Z","packages":[{"ecosystem":"PyPI","name":"open-webui","purl":"pkg:pypi/open-webui","ranges":[">=0.9.6 <0.11.0"],"fixed":["0.11.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}