Medium severity5.4GHSA Advisory· Published May 15, 2026· Updated May 18, 2026
CVE-2026-45318
CVE-2026-45318
Description
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.3, his advisory tracks a regression of the original Excel-preview XSS (CVE-2026-44549). The same root cause — XLSX.utils.sheet_to_html() output rendered via {@html excelHtml} without DOMPurify — was reintroduced sometime after v0.8.0 and is exploitable again This vulnerability is fixed in 0.9.3.
AI Insight
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
open-webuiPyPI | < 0.9.3 | 0.9.3 |
Affected products
2<= 0.9.2+ 1 more
- (no CPE)range: <= 0.9.2
- cpe:2.3:a:openwebui:open_webui:*:*:*:*:*:*:*:*range: <0.9.3
Patches
Vulnerability mechanics
References
5- github.com/open-webui/open-webui/security/advisories/GHSA-hcwp-82g6-8wxcnvdExploitMitigationVendor AdvisoryWEB
- github.com/advisories/GHSA-hcwp-82g6-8wxcghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-45318ghsaADVISORY
- github.com/open-webui/open-webui/releases/tag/v0.9.3ghsaWEB
- github.com/open-webui/open-webui/security/advisories/GHSA-jwf8-pv5p-vhmcghsaWEB
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