CVE-2019-19919
CRITICALCVSS 9.8/10EPSS 7.07%
Last modified
CVE-2019-19919 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. EPSS estimates a 7.07% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Handlebars.Js Project | Handlebars.Js | 1.0.6 |
| Handlebars.Js Project | Handlebars.Js | 1.0.7 |
| Handlebars.Js Project | Handlebars.Js | 1.0.8 |
| Handlebars.Js Project | Handlebars.Js | 1.0.9 |
| Handlebars.Js Project | Handlebars.Js | 1.0.10 |
| Handlebars.Js Project | Handlebars.Js | 1.0.11 |
| Handlebars.Js Project | Handlebars.Js | 1.0.12 |
| Handlebars.Js Project | Handlebars.Js | 1.1.0 |
| Handlebars.Js Project | Handlebars.Js | 1.1.1 |
| Handlebars.Js Project | Handlebars.Js | 1.1.2 |
| Handlebars.Js Project | Handlebars.Js | 1.2.0 |
| Handlebars.Js Project | Handlebars.Js | 1.2.1 |
| Handlebars.Js Project | Handlebars.Js | 1.3.0 |
| Handlebars.Js Project | Handlebars.Js | 2.0.0 |
| Handlebars.Js Project | Handlebars.Js | 3.0.0 |
| Handlebars.Js Project | Handlebars.Js | 3.0.1 |
| Handlebars.Js Project | Handlebars.Js | 3.0.2 |
| Handlebars.Js Project | Handlebars.Js | 3.0.3 |
| Handlebars.Js Project | Handlebars.Js | 3.0.4 |
| Handlebars.Js Project | Handlebars.Js | 3.0.5 |
| Handlebars.Js Project | Handlebars.Js | 3.0.6 |
| Handlebars.Js Project | Handlebars.Js | 3.0.7 |
| Handlebars.Js Project | Handlebars.Js | 4.0.0 |
| Handlebars.Js Project | Handlebars.Js | 4.0.1 |
| Handlebars.Js Project | Handlebars.Js | 4.0.2 |
| Handlebars.Js Project | Handlebars.Js | 4.0.3 |
| Handlebars.Js Project | Handlebars.Js | 4.0.4 |
| Handlebars.Js Project | Handlebars.Js | 4.0.5 |
| Handlebars.Js Project | Handlebars.Js | 4.0.6 |
| Handlebars.Js Project | Handlebars.Js | 4.0.7 |
| Handlebars.Js Project | Handlebars.Js | 4.0.8 |
| Handlebars.Js Project | Handlebars.Js | 4.0.9 |
| Handlebars.Js Project | Handlebars.Js | 4.0.10 |
| Handlebars.Js Project | Handlebars.Js | 4.0.11 |
| Handlebars.Js Project | Handlebars.Js | 4.0.12 |
| Handlebars.Js Project | Handlebars.Js | 4.0.13 |
| Handlebars.Js Project | Handlebars.Js | 4.0.14 |
| Handlebars.Js Project | Handlebars.Js | 4.1.0 |
| Handlebars.Js Project | Handlebars.Js | 4.1.1 |
| Handlebars.Js Project | Handlebars.Js | 4.1.2 |
| Handlebars.Js Project | Handlebars.Js | 4.2.0 |
| Handlebars.Js Project | Handlebars.Js | 4.2.1 |
| Handlebars.Js Project | Handlebars.Js | 4.2.2 |
| Tenable | Tenable.Sc | < 5.19.0 |
References
- https://www.npmjs.com/advisories/1164Third Party Advisory
- https://www.tenable.com/security/tns-2021-14Patch, Third Party Advisory
- https://www.npmjs.com/advisories/1164Third Party Advisory
- https://www.tenable.com/security/tns-2021-14Patch, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2019-19919?
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.
How severe is CVE-2019-19919?
CVE-2019-19919 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 7.07% probability of exploitation in the next 30 days.
How do I fix CVE-2019-19919?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2019-19919?
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Scan your code nowSource: NVD / NIST