CVE-2026-54011
Last modified
CVE-2026-54011 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. 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. EPSS estimates a 0.20% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Openwebui | Open Webui | < 0.9.6 |
References
- https://github.com/open-webui/open-webui/security/advisories/GHSA-v8qj-hxv7-mgvvExploit, Mitigation, Vendor Advisory
- https://github.com/open-webui/open-webui/security/advisories/GHSA-v8qj-hxv7-mgvvExploit, Mitigation, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-54011?
How severe is CVE-2026-54011?
How do I fix CVE-2026-54011?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-54006Open WebUI is a self-hosted artificial intelligence platform…4.3
- CVE-2026-54007Open WebUI is a self-hosted artificial intelligence platform…6.5
- CVE-2026-54008Open WebUI is a self-hosted artificial intelligence platform…8.5
- CVE-2026-54009Open WebUI is a self-hosted artificial intelligence platform…6.5
- CVE-2026-5401AFP Spotlight protocol dissector crash in Wireshark 4.6.0 to…5.5
- CVE-2026-54010Open WebUI is a self-hosted artificial intelligence platform…8.3
- CVE-2026-54012Open WebUI is a self-hosted artificial intelligence platform…7.1
- CVE-2026-54013Open WebUI is a self-hosted artificial intelligence platform…7.6
- CVE-2026-54014Open WebUI is a self-hosted artificial intelligence platform…4.3
- CVE-2026-54015Open WebUI is a self-hosted artificial intelligence platform…6.4
- CVE-2026-54016Open WebUI is a self-hosted artificial intelligence platform…4.3
- CVE-2026-54017Open WebUI is a self-hosted artificial intelligence platform…7.7
Are you affected by CVE-2026-54011?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST