CVE-2026-55240
CVE-2026-55240 · Tianji: Remote Code Execution via lodash template evaluate pattern in survey feed templates
This page contains facts from public vulnerability sources. Check the original advisory before updating.
Tianji is an open source analytics, uptime monitoring, and server status platform. Prior to 1.31.29, formatString() in src/server/utils/template.ts passes survey feedTemplate and monitor notification templates to lodash template(), while the default evaluate pattern remains enabled. A workspace administrator can store an evaluate block using the <% code %> form, and the public survey.submit endpoint renders a survey template when an unauthenticated user submits a response. The compiled template executes server-side JavaScript in the Tianji Node.js process, allowing command execution, secret disclosure, data modification, or service disruption. This issue is fixed in version 1.31.29.
CVSS 9.1 · Critical · EPSS 0.6%
- Published
- Updated
Affected products and versions
tianji
- Versions
- < 1.31.29: Affected
No fix published