CVE-2026-55240

{"id": "CVE-2026-55240", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-55240", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-10-28T20:04:51.050574Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 9.1, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "HIGH", "confidentialityImpact": "HIGH"}, "impactScore": 6.0, "exploitabilityScore": 2.3}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "msgbyte", "product": "tianji", "versions": [{"status": "affected", "version": "< 1.31.29"}]}]}], "published": "2026-10-15T19:17:40.290", "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"}, {"url": "https://github.com/msgbyte/tianji/security/advisories/GHSA-5grg-j3cr-3hpm", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-1336"}]}], "descriptions": [{"lang": "en", "value": "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."}], "lastModified": "2026-10-28T20:18:08.730", "sourceIdentifier": "security-advisories@github.com"}