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CVE-2019-20920

8.1 high SSVC exploitation: none Modified
NVD · CVE.org

Handlebars before 3.0.8 and 4.x before 4.5.3 is vulnerable to Arbitrary Code Execution. The lookup helper fails to properly validate templates, allowing attackers to submit templates that execute arbitrary JavaScript. This can be used to run arbitrary code on a server processing Handlebars templates or in a victim's browser (effectively serving as XSS).

Fix

Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.

Change history 1

  1. First seenCVSS 8.1 · handlebarsjsNVD modified 2026-10-08 22:16

Affected (CPE criteria) 1

  • cpe:2.3:a:handlebarsjs:handlebars:*:*:*:*:*:node.js:*:*

References 6