8.7
CVE-2026-54011
- EPSS 0.2%
- Veröffentlicht 23.06.2026 16:47:43
- Zuletzt bearbeitet 25.06.2026 13:33:32
- Quelle security-advisories@github.com
- CVE-Watchlists
- Unerledigt
LoginOpen WebUI: Stored XSS in Mermaid Markdown Preview
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.6,Open WebUI renders Mermaid blocks from Markdown files in the file preview panel and inserts the generated SVG into the DOM using innerHTML. Because Mermaid is configured with securityLevel: 'loose', attacker-controlled Mermaid content can be rendered unsafely in this flow. A working payload was validated through the Markdown preview path, resulting in JavaScript execution in the victim’s browser under the application origin. This vulnerability is fixed in 0.9.6.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Openwebui ≫ Open Webui Version < 0.9.6
| Typ | Quelle | Score | Percentile |
|---|---|---|---|
| EPSS | FIRST.org | 0.2% | 0.1 |
| Quelle | Base Score | Exploit Score | Impact Score | Vector String |
|---|---|---|---|---|
| nvd@nist.gov | 5.4 | 2.3 | 2.7 |
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
|
| security-advisories@github.com | 8.7 | 2.3 | 5.8 |
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
|
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
https://github.com/open-webui/open-webui/security/advisories/GHSA-v8qj-hxv7-mgvv