{"id":"CVE-2026-55240","title":"Tianji is an open source analytics, uptime monitoring, and server status platform","summary":"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…","severity":"critical","cvss":9.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","cwe":["CWE-1336"],"vendor":"msgbyte","product":"tianji","affected":["tianji < 1.31.29"],"published":"2026-10-15","updated":"2026-10-15","sourceUpdated":"2026-10-15T19:17:40.290","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-55240","references":[{"url":"https://github.com/msgbyte/tianji/commit/132ff67907df897d222829ea8ad1a018ff74df48","label":"security-advisories@github.com"},{"url":"https://github.com/msgbyte/tianji/releases/tag/v1.31.29","label":"security-advisories@github.com"},{"url":"https://github.com/msgbyte/tianji/security/advisories/GHSA-5grg-j3cr-3hpm","label":"security-advisories@github.com"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-10-15T19:25:46.434Z","slug":"CVE-2026-55240","body":"## Overview\n\nTianji 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":50,"depthScoreParts":{"impact":50.1,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}