CVE-2026-70485

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.

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Produits concernés

• open-webui
• Openwebui open webui

Scores CVSS

Faiblesses (CWE)

• CWE-918

Références

• https://github.com/open-webui/open-webui/commit/1717b493d83c86afa82aa8bc50139250852dd2f3 Patch
• https://github.com/open-webui/open-webui/releases/tag/v0.11.0 Release Notes
• https://github.com/open-webui/open-webui/security/advisories/GHSA-8x5v-cpv7-8jjp ExploitVendor Advisory
• https://github.com/open-webui/open-webui/security/advisories/GHSA-8x5v-cpv7-8jjp ExploitVendor Advisory

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories