{"id":"CVE-2026-55240","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-55240","generatedAt":"2026-10-28T00:57:05.049Z","title":"The compiled template executes server-side JavaScript in the Tianji Node.js process, allowing command execution, secret disclosure, data modification, or service disruption.","description":"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.","published":"2026-10-15T19:17:40.000Z","lastModified":"2026-10-16T20:04:30.000Z","status":"Deferred","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":9.1,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H"},"cwe":["CWE-1336"],"affected":[],"epss":{"score":0.00576,"percentile":0.47257,"date":"2026-10-26","history":[{"date":"2026-10-16","score":0.00576,"percentile":0.46327}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.58%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-15T19:17:40.000Z","detail":{"score":"9.1","severity":"CRITICAL","publishedAt":"2026-10-15T19:17:40.290Z"},"summary":"New CVE, critical severity (CVSS 9.1)."}],"references":[{"url":"https://github.com/msgbyte/tianji/commit/132ff67907df897d222829ea8ad1a018ff74df48","source":"security-advisories@github.com"},{"url":"https://github.com/msgbyte/tianji/releases/tag/v1.31.29","source":"security-advisories@github.com"},{"url":"https://github.com/msgbyte/tianji/security/advisories/GHSA-5grg-j3cr-3hpm","source":"security-advisories@github.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-55240","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}