{"id":"CVE-2026-109290","revision":"a6ec0052727d47b5a5c1ba1bb9dc4d8c","records":[{"revision":"a6ec0052727d47b5a5c1ba1bb9dc4d8c","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-109290","aliases":[],"title":"Open WebUI 0.11.1 before 0.11.4 Stored XSS via DOCX Preview","description":"Open WebUI from 0.11.1 before 0.11.4 contains a stored cross-site scripting vulnerability in DocxPreview.svelte that allows authenticated users to execute script by uploading crafted DOCX attachments. Attackers can embed an OOXML altChunk HTML part or script-scheme hyperlink to steal a previewing administrator's session token from local storage and take over the instance.","state":0,"publishedAt":"2026-10-12T16:04:51.655+00:00","modifiedAt":"2026-10-13T18:08:17.883+00:00","affected":[{"ecosystem":"Vendor product","name":"open-webui","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"open-webui\",\n                    \"product\": \"open-webui\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"packageURL\": \"pkg:pypi/open-webui\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0.11.1\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThan\": \"0.11.4\"\n                        },\n                        {\n                            \"version\": \"0.11.4\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","score":8.4,"severity":"HIGH"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N","score":7.3,"severity":"HIGH"}],"references":["https://github.com/open-webui/open-webui/security/advisories/GHSA-f9xp-mfmq-x6cg","https://www.vulncheck.com/advisories/open-webui-0.11.1-before-0.11.4-stored-xss-via-docx-preview"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-109290","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-109290","identifiers":["CVE-2026-109290"]},"retained":false,"historicalAffected":[]}],"coverage":[]}