Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, validate_url() in backend/open_webui/retrieval/web/utils.py calls validators.ipv6(ip, private=True), but the validators library does NOT implement the private keyword for IPv6 — the call raises a ValidationError (which is falsy in a boolean context), so every IPv6 address passes the filter. In addition, IPv4-mapped IPv6 (::ffff:10.0.0.1) bypasses the IPv4 check entirely, and several reserved IPv4 ranges (0.0.0.0/8, 100.64.0.0/10, 192.0.0.0/24, etc.) are not blocked. This vulnerability is fixed in 0.9.0.

Project Subscriptions

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-4v7r-f4w8-8972 Open WebUI has a full SSRF Vulnerability in the RAG Web Search Feature
Fixes

Solution

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Workaround

No workaround given by the vendor.

History

Fri, 15 May 2026 19:30:00 +0000

Type Values Removed Values Added
Description Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, validate_url() in backend/open_webui/retrieval/web/utils.py calls validators.ipv6(ip, private=True), but the validators library does NOT implement the private keyword for IPv6 — the call raises a ValidationError (which is falsy in a boolean context), so every IPv6 address passes the filter. In addition, IPv4-mapped IPv6 (::ffff:10.0.0.1) bypasses the IPv4 check entirely, and several reserved IPv4 ranges (0.0.0.0/8, 100.64.0.0/10, 192.0.0.0/24, etc.) are not blocked. This vulnerability is fixed in 0.9.0.
Title Open WebUI: Full SSRF Vulnerability in the RAG Web Search Feature
Weaknesses CWE-918
References
Metrics cvssV3_1

{'score': 8.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-05-15T19:22:58.795Z

Reserved: 2026-05-11T20:50:30.540Z

Link: CVE-2026-45331

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-05-15T20:16:48.563

Modified: 2026-05-15T20:16:48.563

Link: CVE-2026-45331

cve-icon Redhat

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cve-icon OpenCVE Enrichment

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Weaknesses