{"id":"CVE-2026-70480","aliases":["GHSA-rffm-9q57-q649","PYSEC-2026-3651"],"url":"https://o3.security/vulnerability/CVE-2026-70480","summary":"Open WebUI: Client-side SSRF via unrestricted external resource loading in Vega/Vega-Lite chart rendering","details":"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.","published":"2026-08-04T19:43:15.645Z","modified":"2026-09-10T03:31:05.979655102Z","cvss":{"score":4.1,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:N/A:N"},"epss":{"score":0.00192,"percentile":0.08867,"asOf":"2026-08-24"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"open-webui","fixedVersion":"0.11.0"}],"fix":{"url":"https://github.com/open-webui/open-webui/commit/5278eb906ebecefc6538a19bc86df09d997e43e6","label":"open-webui/open-webui@5278eb9"},"references":[{"type":"WEB","url":"https://github.com/open-webui/open-webui/releases/tag/v0.11.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/70xxx/CVE-2026-70480.json"},{"type":"ADVISORY","url":"https://github.com/open-webui/open-webui/security/advisories/GHSA-rffm-9q57-q649"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-70480"},{"type":"FIX","url":"https://github.com/open-webui/open-webui/commit/5278eb906ebecefc6538a19bc86df09d997e43e6"},{"type":"FIX","url":"https://github.com/open-webui/open-webui/pull/26806"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-10T03:31:05.979655102Z"}}