{"id":"CVE-2026-70480","published":"2026-08-04T20:16:54.903","lastModified":"2026-08-05T15:17:09.190","description":"Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.6.34 until 0.11.0, Open WebUI renders vega and vega-lite fenced code blocks in chat content by building a Vega view in the viewer browser without a restricted resource loader. Any user who can place such a block where another user will see it can make that user browser issue attacker-chosen outbound GET requests and read responses from same-origin or CORS-permissive targets into the rendered page. This issue is fixed in 0.11.0.","cvssScore":4.1,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:N/A:N","cwes":["CWE-918"],"vendors":[],"products":[],"references":[{"url":"https://github.com/open-webui/open-webui/commit/5278eb906ebecefc6538a19bc86df09d997e43e6","tags":[]},{"url":"https://github.com/open-webui/open-webui/pull/26806","tags":[]},{"url":"https://github.com/open-webui/open-webui/releases/tag/v0.11.0","tags":[]},{"url":"https://github.com/open-webui/open-webui/security/advisories/GHSA-rffm-9q57-q649","tags":[]},{"url":"https://github.com/open-webui/open-webui/security/advisories/GHSA-rffm-9q57-q649","tags":[]}],"exploitRefs":[{"url":"https://github.com/open-webui/open-webui/commit/5278eb906ebecefc6538a19bc86df09d997e43e6","tags":[]},{"url":"https://github.com/open-webui/open-webui/pull/26806","tags":[]},{"url":"https://github.com/open-webui/open-webui/releases/tag/v0.11.0","tags":[]},{"url":"https://github.com/open-webui/open-webui/security/advisories/GHSA-rffm-9q57-q649","tags":[]},{"url":"https://github.com/open-webui/open-webui/security/advisories/GHSA-rffm-9q57-q649","tags":[]}],"hasPoc":true,"ai":null}