# Handlebars project Handlebars vulnerabilities

Source: https://junglewise.ai/threats/technologies/handlebars  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 9 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/handlebars.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 5 vulnerabilities in Handlebars project Handlebars: 0 in the last 7 days and 0 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-33916, was published on 27 March 2026.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 0
- All time: 5 (0 critical, 0 exploited in the wild)

## About Handlebars project Handlebars

Templating engine that uses handlebars syntax to generate dynamic HTML and text output.

## Latest Handlebars project Handlebars vulnerabilities

- [CVE-2026-33916: Handlebars.js prototype pollution XSS via partial template injection](https://junglewise.ai/threats/cve-2026-33916-handlebars-js-prototype-pollution-in-resolvepartial-leads-to-xss) (medium, CVSS 4.7, published 27 Mar 2026)
- [CVE-2019-20920: Handlebars arbitrary code execution in lookup helper](https://junglewise.ai/threats/cve-2019-20920-handlebars-arbitrary-code-execution-in-lookup-helper) (low, CVSS 3.1, published 10 Feb 2022)
- [Handlebars arbitrary code execution in lookup helper](https://junglewise.ai/threats/handlebars-arbitrary-code-execution-in-lookup-helper-e5650e93) (low, CVSS 3.1, published 4 Sep 2020)
- [CVE-2019-19919: Handlebars prototype pollution remote code execution](https://junglewise.ai/threats/cve-2019-19919-handlebars-prototype-pollution-remote-code-execution) (low, CVSS 3.1, published 26 Dec 2019)
- [CVE-2015-8861: Handlebars.js XSS in unquoted template attributes](https://junglewise.ai/threats/cve-2015-8861-handlebars-js-xss-in-unquoted-template-attributes) (medium, CVSS 6.1, published 23 Jan 2017)

## Most severe Handlebars project Handlebars vulnerabilities

- [CVE-2015-8861: Handlebars.js XSS in unquoted template attributes](https://junglewise.ai/threats/cve-2015-8861-handlebars-js-xss-in-unquoted-template-attributes) (medium, CVSS 6.1, published 23 Jan 2017)
- [CVE-2026-33916: Handlebars.js prototype pollution XSS via partial template injection](https://junglewise.ai/threats/cve-2026-33916-handlebars-js-prototype-pollution-in-resolvepartial-leads-to-xss) (medium, CVSS 4.7, published 27 Mar 2026)
- [CVE-2019-19919: Handlebars prototype pollution remote code execution](https://junglewise.ai/threats/cve-2019-19919-handlebars-prototype-pollution-remote-code-execution) (low, CVSS 3.1, published 26 Dec 2019)
- [CVE-2019-20920: Handlebars arbitrary code execution in lookup helper](https://junglewise.ai/threats/cve-2019-20920-handlebars-arbitrary-code-execution-in-lookup-helper) (low, CVSS 3.1, published 10 Feb 2022)
- [Handlebars arbitrary code execution in lookup helper](https://junglewise.ai/threats/handlebars-arbitrary-code-execution-in-lookup-helper-e5650e93) (low, CVSS 3.1, published 4 Sep 2020)

## Vulnerabilities per week

Nothing was published in the last eight weeks.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "Handlebars project Handlebars vulnerabilities", https://junglewise.ai/threats/technologies/handlebars, 9 November 2026.