{"id":"CVE-2026-70485","published":"2026-08-04T20:16:55.610","lastModified":"2026-08-05T16:17:02.507","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.","cvssScore":7.1,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N","cwes":["CWE-918"],"vendors":[],"products":[],"references":[{"url":"https://github.com/open-webui/open-webui/commit/1717b493d83c86afa82aa8bc50139250852dd2f3","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-8x5v-cpv7-8jjp","tags":[]},{"url":"https://github.com/open-webui/open-webui/security/advisories/GHSA-8x5v-cpv7-8jjp","tags":[]}],"exploitRefs":[{"url":"https://github.com/open-webui/open-webui/commit/1717b493d83c86afa82aa8bc50139250852dd2f3","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-8x5v-cpv7-8jjp","tags":[]},{"url":"https://github.com/open-webui/open-webui/security/advisories/GHSA-8x5v-cpv7-8jjp","tags":[]}],"hasPoc":true,"ai":{"summary":"The flaw allows users to bypass global routability checks by embedding IPv4 addresses in transition encodings within a NAT64 gateway, potentially exposing internal network responses.","exploitability":"Exploitation requires access to a NAT64 environment and knowledge of the specific encoding techniques. It is moderately difficult due to these preconditions.","blast_radius":"If exploited, it could lead to unauthorized access to internal network resources through web interfaces or AI platform integrations.","remediation":"Update Open WebUI to version 0.11.0 or later to apply proper checks for both IPv4 and IPv6 addresses.","tags":["web","network","security","bypass"],"model":"qwen2.5:7b-instruct","analyzedAt":"2026-08-11T07:03:41.137Z"}}