CVE-2026-55240

LOWCVSS 9.1 · CRITICAL

Signal is active with 1 mentions in latest observed window

Immediate actions

Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD 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.

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0.0/ 10 priority

Sources & remediation

Other references

Weakness type (CWE)

CWE-1336

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Threat summary

1 mentions across 1 observed day

What's happening

1 total mentions across 1 day

Deep dive

Activity timeline1 mentions / 1d

Full discourse1 post

Atlas Threat Monitoring@ThreatAtlas1d
Unpatched vulnerabilities don't stay hidden on our atlas. #CVE CRITICAL VULNERABILITY DETECTED CVE ID: CVE-2026-55240 Vendor: Unknown Severity: Critical — CVSS 9.1 Product: Unknown Date: 2026-10-15 A critical vulnerability (Improper Neutralization of Special Elements Used in a Template Engine) has been disclosed affecting Unknown. Patch immediately. Powered by @Brandefense #ThreatIntel #CyberSecurity #CVE #Unknown
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