CVE-2026-70485

7.1 HIGHpublic exploit available

Published 2026-08-04 · Updated 2026-08-05

AI risk analysis

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.
Prioritized remediation: Update Open WebUI to version 0.11.0 or later to apply proper checks for both IPv4 and IPv6 addresses.

webnetworksecuritybypass

Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.

NVD 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 vector

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N

Weaknesses

CWE-918

Public exploit & PoC references

All references

Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.