{"cve":"CVE-2026-70480","nvd":{"published":"2026-08-04T20:16:54.903","modified":"2026-09-18T14:45:55.337","status":"Analyzed","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:N/A:N","score":4.1},"cwes":["CWE-918"],"references":["https://github.com/open-webui/open-webui/commit/5278eb906ebecefc6538a19bc86df09d997e43e6","https://github.com/open-webui/open-webui/pull/26806","https://github.com/open-webui/open-webui/releases/tag/v0.11.0","https://github.com/open-webui/open-webui/security/advisories/GHSA-rffm-9q57-q649","https://github.com/open-webui/open-webui/security/advisories/GHSA-rffm-9q57-q649"],"products":["openwebui:open_webui"],"source":"nvd","synced_at":"2026-10-19T22:47:10.050265369+00:00"},"epss":{"cve":"CVE-2026-70480","score":0.00346,"percentile":0.28198,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-rffm-9q57-q649","url":"https://osv.dev/vulnerability/GHSA-rffm-9q57-q649","summary":"Open WebUI: Client-side SSRF via unrestricted external resource loading in Vega/Vega-Lite chart rendering","modified":"2026-08-10T11:40:42.753054540Z","packages":[{"ecosystem":"PyPI","name":"open-webui","purl":"pkg:pypi/open-webui","ranges":[">=0.6.34 <0.11.0"],"fixed":["0.11.0"]}]},{"id":"PYSEC-2026-3651","url":"https://osv.dev/vulnerability/PYSEC-2026-3651","summary":"Open WebUI: Client-side SSRF via unrestricted external resource loading in Vega/Vega-Lite chart rendering","modified":"2026-08-10T11:30:11.734258596Z","packages":[{"ecosystem":"PyPI","name":"open-webui","purl":"pkg:pypi/open-webui","ranges":[">=0.6.34 <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."]}