# Handlebars.js vulnerabilities

Source: https://junglewise.ai/threats/technologies/handlebars-handlebars-js  
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-handlebars-js.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 4 vulnerabilities in Handlebars.js: 0 in the last 7 days and 2 in the last 90 days, 1 of them critical and 0 exploited in the wild. The most recent, CVE-2026-106446, was published on 6 October 2026. Nothing in the last four weeks, down from 2 vulnerabilities in the four before. 0 critical against 1.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 2
- All time: 4 (1 critical, 0 exploited in the wild)

## About Handlebars.js

JavaScript templating engine for compiling and rendering dynamic HTML templates.

## Latest Handlebars.js vulnerabilities

- [CVE-2026-106446: Handlebars AST validation bypass in compile and precompile](https://junglewise.ai/threats/cve-2026-106446-handlebars-provides-the-power-necessary-to-let-users-build) (critical, CVSS 9.8, published 6 Oct 2026)
- [CVE-2026-106444: Handlebars precompile script injection in generated code](https://junglewise.ai/threats/cve-2026-106444-handlebars-provides-the-power-necessary-to-let-users-build) (medium, CVSS 4.7, published 6 Oct 2026)
- [Handlebars.js prototype method access control gap via missing __lookupSetter__](https://junglewise.ai/threats/handlebars-js-prototype-method-access-control-gap-via-missing-f97c2407) (low, CVSS 3.1, published 29 Mar 2026)
- [Handlebars.js remote code execution via template injection](https://junglewise.ai/threats/handlebars-js-remote-code-execution-via-template-injection-c5d2b812) (info, published 15 Jul 2019)

## Most severe Handlebars.js vulnerabilities

- [CVE-2026-106446: Handlebars AST validation bypass in compile and precompile](https://junglewise.ai/threats/cve-2026-106446-handlebars-provides-the-power-necessary-to-let-users-build) (critical, CVSS 9.8, published 6 Oct 2026)
- [CVE-2026-106444: Handlebars precompile script injection in generated code](https://junglewise.ai/threats/cve-2026-106444-handlebars-provides-the-power-necessary-to-let-users-build) (medium, CVSS 4.7, published 6 Oct 2026)
- [Handlebars.js prototype method access control gap via missing __lookupSetter__](https://junglewise.ai/threats/handlebars-js-prototype-method-access-control-gap-via-missing-f97c2407) (low, CVSS 3.1, published 29 Mar 2026)
- [Handlebars.js remote code execution via template injection](https://junglewise.ai/threats/handlebars-js-remote-code-execution-via-template-injection-c5d2b812) (info, published 15 Jul 2019)

## Vulnerabilities per week

Nothing in the last four weeks, down from 2 vulnerabilities in the four before. 0 critical against 1.

| 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 | 2 | 1 | 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 |

## Other Handlebars technologies

- [Handlebars](https://junglewise.ai/threats/technologies/handlebars-handlebars): 9 vulnerabilities

## 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.js vulnerabilities", https://junglewise.ai/threats/technologies/handlebars-handlebars-js, 9 November 2026.