{"id":"CVE-2026-70485","state":"PUBLISHED","title":"Open WebUI: Any authenticated user can reach internal services and cloud metadata via NAT64-encoded URLs","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.","publishedAt":"2026-08-04T19:59:21.539Z","updatedAt":"2026-08-05T14:40:22.659Z","severity":{"score":7.1,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["open-webui open-webui"],"affected":[{"vendor":"open-webui","product":"open-webui","versions":[{"version":">= 0.9.0, < 0.11.0","status":"affected"}]}],"references":["https://github.com/open-webui/open-webui/security/advisories/GHSA-8x5v-cpv7-8jjp","https://github.com/open-webui/open-webui/commit/1717b493d83c86afa82aa8bc50139250852dd2f3","https://github.com/open-webui/open-webui/releases/tag/v0.11.0"],"weaknesses":["CWE-918"],"ingestedAt":"2026-10-29T20:12:49.727Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/70xxx/CVE-2026-70485.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-70485","state":"PUBLISHED","datePublished":"2026-08-04T19:59:21.539Z","dateUpdated":"2026-08-05T14:40:22.659Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-08-04T15:24:41.340Z"},"containers":{"cna":{"title":"Open WebUI: Any authenticated user can reach internal services and cloud metadata via NAT64-encoded URLs","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"open-webui","product":"open-webui","versions":[{"version":">= 0.9.0, < 0.11.0","status":"affected"}]}],"references":[{"url":"https://github.com/open-webui/open-webui/security/advisories/GHSA-8x5v-cpv7-8jjp","name":"https://github.com/open-webui/open-webui/security/advisories/GHSA-8x5v-cpv7-8jjp","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/open-webui/open-webui/commit/1717b493d83c86afa82aa8bc50139250852dd2f3","name":"https://github.com/open-webui/open-webui/commit/1717b493d83c86afa82aa8bc50139250852dd2f3","tags":["x_refsource_MISC"]},{"url":"https://github.com/open-webui/open-webui/releases/tag/v0.11.0","name":"https://github.com/open-webui/open-webui/releases/tag/v0.11.0","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.1,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-918","lang":"en","description":"CWE-918: Server-Side Request Forgery (SSRF)","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-08-04T19:59:21.539Z"},"source":{"advisory":"GHSA-8x5v-cpv7-8jjp","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/open-webui/open-webui/security/advisories/GHSA-8x5v-cpv7-8jjp","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-05T14:40:14.214165Z","id":"CVE-2026-70485","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-05T14:40:22.659Z"}}]}}}