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CVE-2026-70485

7.1 · HIGH

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform.

Published Aug 4, 2026CWE-918EPSS 0.35%

Overview

CVE-2026-70485 is a high-severity vulnerability. It was published on August 4, 2026 and has a CVSS 3.1 base score of 7.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/open-webui/open-webui/commit/1717b493d83c86afa82aa8bc50139250852dd2f3GitHubgithub.com/open-webui/open-webui/releases/tag/v0.11.0GitHubgithub.com/open-webui/open-webui/security/advisories/GHSA-8x5v-cpv7-8jjpGitHubgithub.com/open-webui/open-webui/security/advisories/GHSA-8x5v-cpv7-8jjp

How CyberStrike helps

Frequently asked questions

What is CVE-2026-70485?

CVE-2026-70485 is a high-severity vulnerability. It was published on August 4, 2026 and has a CVSS 3.1 base score of 7.1 (HIGH).

How severe is CVE-2026-70485?

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-70485?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-70485?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-70485 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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