{"id":"CVE-2026-45331","published":"2026-05-15T19:22:58Z","modified":"2026-05-15T22:21:52Z","title":"Open WebUI: Full SSRF Vulnerability in the RAG Web Search Feature","vendor":"open-webui","product":"open-webui","tier":"tail","description":{"text":"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.","provenance":"source","from":"CVE.org"},"cvss":{"score":8.5,"severity":"HIGH","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N","provenance":"source","from":"CVE.org CNA"},"epss":{"score":0.00286,"percentile":0.21065,"provenance":"source"},"cwes":[{"id":"CWE-918","name":"Server-Side Request Forgery"}],"references":[{"url":"https://github.com/open-webui/open-webui/security/advisories/GHSA-4v7r-f4w8-8972","tags":["x_refsource_CONFIRM"]}],"priority":{"score":10.2,"factors":[{"name":"EPSS percentile","points":4.21},{"name":"CVSS severity","points":5.95}]},"vendorSlug":"open-webui","affectedVersions":[{"vendor":"open-webui","product":"open-webui","versions":["< 0.9.0"]}],"affected":[{"ecosystem":"PyPI","package":"open-webui","vulnerableRanges":["<0.9.0"],"patched":["0.9.0"],"from":["GHSA-4v7r-f4w8-8972","PYSEC-2026-2702"],"provenance":"source"}],"euvd":{"id":"EUVD-2026-30611","exploited":false,"provenance":"source"},"lineage":{"familyId":"fam-open-webui-cve-2025-65958","parents":[{"from":"CVE-2025-65958","to":"CVE-2026-45331","relation":"related","confidence":"high","kind":"lineage","evidence":[{"kind":"osv-related","provenance":"source","id":"GHSA-4v7r-f4w8-8972","via":"reference","url":"https://github.com/advisories/GHSA-c6xv-rcvw-v685"},{"kind":"osv-related","provenance":"source","id":"PYSEC-2026-2702","via":"reference","url":"https://github.com/advisories/GHSA-c6xv-rcvw-v685"}]}]}}