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Vulnerability record · CVE-2026-70485 · published 4 August 2026

CVE-2026-70485: Openwebui open webui server-side request forgery (ssrf) vulnerability

Openwebui · Open Webui

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.

7.1 CVSS 3.1 High EPSS 0.35% · top 73.8% CWE-918 · Server-side request forgery (SSRF)
7.1CVSS 3.1 base score
0.35%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References, 2 tagged exploit
18 Sep 2026Last modified by 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:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
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

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-70485), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.