{"cve":"CVE-2026-70485","nvd":{"published":"2026-08-04T20:16:55.610","modified":"2026-09-18T14:46:45.820","status":"Analyzed","description":"Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.0 until 0.11.0, Open WebUI checked whether a user-supplied URL destination was globally routable by applying ipaddress.is_global to the literal IPv6 address without examining IPv4 addresses embedded in transition encodings. On a deployment with a NAT64 gateway, any verified user could wrap an internal or cloud-metadata IPv4 address in the NAT64 well-known prefix, pass the filter, and receive the internal response body through RAG URL ingestion, URL-to-markdown conversion, or web-search content retrieval. This issue is fixed in 0.11.0.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N","score":7.1},"cwes":["CWE-918"],"references":["https://github.com/open-webui/open-webui/commit/1717b493d83c86afa82aa8bc50139250852dd2f3","https://github.com/open-webui/open-webui/releases/tag/v0.11.0","https://github.com/open-webui/open-webui/security/advisories/GHSA-8x5v-cpv7-8jjp","https://github.com/open-webui/open-webui/security/advisories/GHSA-8x5v-cpv7-8jjp"],"products":["openwebui:open_webui"],"source":"nvd","synced_at":"2026-10-19T22:47:10.050265369+00:00"},"epss":{"cve":"CVE-2026-70485","score":0.00351,"percentile":0.28746,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-8x5v-cpv7-8jjp","url":"https://osv.dev/vulnerability/GHSA-8x5v-cpv7-8jjp","summary":"Open WebUI: Any authenticated user can reach internal services and cloud metadata via NAT64-encoded URLs","modified":"2026-08-10T11:40:56.290813097Z","packages":[{"ecosystem":"PyPI","name":"open-webui","purl":"pkg:pypi/open-webui","ranges":[">=0.9.0 <0.11.0"],"fixed":["0.11.0"]}]},{"id":"PYSEC-2026-3645","url":"https://osv.dev/vulnerability/PYSEC-2026-3645","summary":"Open WebUI: Any authenticated user can reach internal services and cloud metadata via NAT64-encoded URLs","modified":"2026-08-10T11:30:10.421836876Z","packages":[{"ecosystem":"PyPI","name":"open-webui","purl":"pkg:pypi/open-webui","ranges":[">=0.9.0 <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."]}