Disclosure summary
OneUptime is a solution for monitoring and managing online services. Prior to 10.0.23, the Markdown viewer component renders Mermaid diagrams with securityLevel: "loose" and injects the SVG output via innerHTML. This configuration explicitly allows interactive event bindings in Mermaid diagrams, enabling XSS through Mermaid's click directive which can execute arbitrary JavaScript. Any field that renders markdown (incident descriptions, status page announcements, monitor notes) is vulnerable. This vulnerability is fixed in 10.0.23.
Source-reported weakness categories
CWE-79
Source-specific records & product guidance
Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.
NIST National Vulnerability Database · NVD-CVE-2026-32308
Open original source · Updated Oct 07, 2026
Only CPE matches marked vulnerable=true are indexed. AND/OR platform conditions must be checked in the original NVD record.
| Vendor | Product / association | Version / bounds |
|---|---|---|
| hackerbay | oneuptime | * {"versionEndExcluding":"10.0.23"} |
Original records & references
- NIST NVD record
- CVE Program record
- github.com — Exploit, Mitigation, Vendor Advisory
PUBLISHED 2026-03-13T15:54:42-04:00
MODIFIED 2026-10-07T04:10:00-04:00
INGESTED 2026-10-08T12:40:21-04:00