Vulnerability details
CVE-2026-44549
open-webui open-webui
Open WebUI: Stored XSS in excel file preview
CVSS 3.1
7.3High
Official description
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.8.0, Excel file attachments are previewed in an unsafe way. A crafted XLSX file payload can be used to cause the sheetjs function sheet_to_html to embed an XSS payload into the generated HTML. This is subsequently added to the DOM unsanitized via @html causing the payload to trigger. This vulnerability is fixed in 0.8.0.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 7.3High | 3.1 | CVEProject cvelistV5 (CNA) (GitHub_M) | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| open-webui | open-webui | < 0.8.0 | CVEProject cvelistV5 (CNA) |
References and advisories
1- https://github.com/open-webui/open-webui/security/advisories/GHSA-jwf8-pv5p-vhmc x_refsource_CONFIRM
Kolun on Telegram @kolunsec
Exploited CVEs, key news and a daily digest
Alerts for this product's next CVEsFollow the product to get new vulnerabilities on Telegram.
Details
- Published
- 2026-05-16
- Last updated
- 2026-05-18
- State
- Published
- Assigner (CNA)
- GitHub_M
Exploit prediction (EPSS)
0.31%
Probability of exploitation in 30 days
24.9%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- Proof of concept
- Technical impact
- Total
Weaknesses (CWE)
- CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')