CVE-2026-55240
criticalTianji is an open source analytics, uptime monitoring, and server status platform.
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 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:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/msgbyte/tianji/commit/132ff67907df897d222829ea8ad1a018ff74df48 security-advisories@github.com
- https://github.com/msgbyte/tianji/releases/tag/v1.31.29 security-advisories@github.com
- https://github.com/msgbyte/tianji/security/advisories/GHSA-5grg-j3cr-3hpm security-advisories@github.com
- https://github.com/msgbyte/tianji/security/advisories/GHSA-5grg-j3cr-3hpm 134c704f-9b21-4f2e-91b3-4a467353bcc0