CVE-2026-45331

CVE Enrichment

CVSS: 8.5 HIGH
EPSS: 0.29%
EPSS Percentile: 21.15%
CISA KEV: Not listed

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.

Technical Details

CVSS Version: 3.1
CNA / NVD Source: [email protected]
Published: 16-May-2026 03:16
Last Modified: 17-Jun-2026 17:51
EPSS Date: 2026-10-30
CWE: CWE-918

CVSS Vector


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

Affected Products / Versions

openwebui / open_webui
Version / affected range: * · before (exclusive) 0.9.0
cpe:2.3:a:openwebui:open_webui:*:*:*:*:*:*:*:*

References

134c704f-9b21-4f2e-91b3-4a467353bcc0

Last enrichment sync: 31-Oct-2026 07:34
Sources: NVD · FIRST EPSS · CISA KEV
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Reported Context (1)

Open-WebUI CVE-2026-45331 Sysdig Tracks CTF-Framed LLM Jailbreaks Behind Exploit Attempts on AI Tools

CVE (11)

MITRE ATT&CK (4)

Products (8)

Countries (1)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.