{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-109290", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-10-12T14:12:52.833Z", "datePublished": "2026-10-12T16:04:51.655Z", "dateUpdated": "2026-10-12T16:04:51.655Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-10-12T16:04:51.655Z" }, "datePublic": "2026-09-27T00:00:00.000Z", "title": "Open WebUI 0.11.1 before 0.11.4 Stored XSS via DOCX Preview", "descriptions": [ { "lang": "en", "value": "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." } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "description": "Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')", "cweId": "CWE-79", "type": "CWE" } ] } ], "affected": [ { "vendor": "open-webui", "product": "open-webui", "defaultStatus": "unaffected", "packageURL": "pkg:pypi/open-webui", "versions": [ { "version": "0.11.1", "status": "affected", "versionType": "semver", "lessThan": "0.11.4" }, { "version": "0.11.4", "status": "unaffected", "versionType": "semver" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:a:openwebui:open_webui:*:*:*:*:*:*:*:*", "versionStartIncluding": "0.11.1", "versionEndExcluding": "0.11.4" } ] } ] } ], "metrics": [ { "format": "CVSS", "cvssV4_0": { "version": "4.0", "vectorString": "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", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "ACTIVE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 8.4, "baseSeverity": "HIGH" } }, { "format": "CVSS", "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "NONE", "baseScore": 7.3, "baseSeverity": "HIGH" } } ], "references": [ { "url": "https://github.com/open-webui/open-webui/security/advisories/GHSA-f9xp-mfmq-x6cg", "tags": [ "vendor-advisory" ], "name": "GitHub Security Advisory (GHSA-f9xp-mfmq-x6cg)" }, { "name": "VulnCheck Advisory: Open WebUI 0.11.1 before 0.11.4 Stored XSS via DOCX Preview", "tags": [ "third-party-advisory" ], "url": "https://www.vulncheck.com/advisories/open-webui-0.11.1-before-0.11.4-stored-xss-via-docx-preview" } ], "credits": [ { "lang": "en", "value": "Observerkay", "type": "reporter" }, { "lang": "en", "value": "Classic298", "type": "finder" } ], "x_generator": { "engine": "vulncheck-endgame" } } } }