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CVE-2026-70485

7.1 HIGHPublic exploitEPSS 0.22%
  1. Published4 Aug 2026

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 3.1 breakdown

Attack vectorNetwork
Attack complexityHigh
Privileges requiredLow
User interactionNone
ScopeChanged
ConfidentialityHigh
IntegrityLow
AvailabilityNone
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N

Affected products

Openwebui Open Webui≥ 0.9.0 < 0.11.0

Remediation

Fixed in
Openwebui Open Webui≥ 0.11.0

References

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Frequently asked

Is CVE-2026-70485 being actively exploited?

CVE-2026-70485 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.22%.

How severe is CVE-2026-70485?

CVE-2026-70485 has a CVSS 3.1 base score of 7.1, rated high. EPSS estimates a 0.22% probability of exploitation.

Which products are affected by CVE-2026-70485?

Affected products include Openwebui Open Webui.

How do I fix CVE-2026-70485?

Upgrade affected software to a fixed version, for example Openwebui Open Webui 0.11.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-70485 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.