{"cve":"CVE-2026-87998","nvd":{"published":"2026-09-09T22:18:48.460","modified":"2026-09-16T15:14:19.507","status":"Analyzed","description":"Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.10.0 until 0.11.1, DELETE /api/v1/knowledge/{id}/delete in backend/open_webui/routers/knowledge.py authorized deletion against the knowledge base but then removed its administrator-owned external connection without a separate administrator check or a check for other dependent knowledge bases. A non-administrator with write access to one external knowledge base could delete shared instance configuration and make every other knowledge base using that connection unavailable. This issue is fixed in version 0.11.1.","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:H/A:L","score":7.1},"cwes":["CWE-269","CWE-863"],"references":["https://github.com/open-webui/open-webui/commit/dc03e7e595d61be97b25a1dd7bb99ad264f73199","https://github.com/open-webui/open-webui/pull/28113","https://github.com/open-webui/open-webui/releases/tag/v0.11.1","https://github.com/open-webui/open-webui/security/advisories/GHSA-2724-6cpj-gf3v"],"products":["openwebui:open_webui"],"source":"nvd","synced_at":"2026-10-19T22:52:53.108888569+00:00"},"epss":{"cve":"CVE-2026-87998","score":0.00486,"percentile":0.41856,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-2724-6cpj-gf3v","url":"https://osv.dev/vulnerability/GHSA-2724-6cpj-gf3v","summary":"Open WebUI: Non-admin users can delete admin-owned external knowledge connections via knowledge base deletion","modified":"2026-10-01T17:56:10.794202208Z","packages":[{"ecosystem":"PyPI","name":"open-webui","purl":"pkg:pypi/open-webui","ranges":[">=0.10.0 <0.11.1"],"fixed":["0.11.1"]}]},{"id":"PYSEC-2026-4115","url":"https://osv.dev/vulnerability/PYSEC-2026-4115","summary":"Open WebUI: Non-admin users can delete admin-owned external knowledge connections via knowledge base deletion","modified":"2026-10-01T17:45:10.032174104Z","packages":[{"ecosystem":"PyPI","name":"open-webui","purl":"pkg:pypi/open-webui","ranges":[">=0.10.0 <0.11.1"],"fixed":["0.11.1"]}]}],"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."]}