VULNERABILITY INTELLIGENCE
CVE-2019-19919
CVSS score9.8 CRITICAL
EPSS probability7.07%
CISA KEVNot currently listed
Published2019-12-20
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Description
Versions of handlebars prior to 4.3.0 are vulnerable to Prototype Pollution leading to Remote Code Execution. Templates may alter an Object's __proto__ and __defineGetter__ properties, which may allow an attacker to execute arbitrary code through crafted payloads.
Weakness classification
- CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Primary references
- cve@mitre.org — Third Party Advisory
- cve@mitre.org — Patch, Third Party Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Patch, Third Party Advisory