# Handlebars.js Project Handlebars.js vulnerabilities

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

Junglewise Threat Intelligence has tracked 7 vulnerabilities in Handlebars.js Project Handlebars.js: 0 in the last 7 days and 0 in the last 90 days, 1 of them critical and 0 exploited in the wild. The most recent, CVE-2026-33941, was published on 27 March 2026.

## Counts

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

## About Handlebars.js Project Handlebars.js

JavaScript templating engine for generating HTML from templates and data.

## Latest Handlebars.js Project Handlebars.js vulnerabilities

- [CVE-2026-33941: Handlebars handlebars.js code injection in CLI precompiler](https://junglewise.ai/threats/cve-2026-33941-handlebars-handlebars-js-code-injection-in-cli-precompiler) (high, CVSS 8.2, published 27 Mar 2026)
- [CVE-2026-33940: Handlebars.js remote code execution via AST type confusion](https://junglewise.ai/threats/cve-2026-33940-handlebars-js-remote-code-execution-via-ast-type-confusion) (high, CVSS 8.1, published 27 Mar 2026)
- [CVE-2026-33939: Handlebars.js denial of service via malformed decorator syntax](https://junglewise.ai/threats/cve-2026-33939-handlebars-js-denial-of-service-via-malformed-decorator-syntax) (high, CVSS 7.5, published 27 Mar 2026)
- [CVE-2026-33938: Handlebars.js remote code execution via @partial-block AST injection](https://junglewise.ai/threats/cve-2026-33938-handlebars-js-remote-code-execution-via-partial-block-ast) (high, CVSS 8.1, published 27 Mar 2026)
- [CVE-2026-33937: Handlebars.js remote code execution via AST type confusion in compile](https://junglewise.ai/threats/cve-2026-33937-handlebars-js-remote-code-execution-via-ast-type-confusion-in) (critical, CVSS 9.8, published 27 Mar 2026)
- [CVE-2021-23369: Handlebars remote code execution in template compilation](https://junglewise.ai/threats/cve-2021-23369-handlebars-remote-code-execution-in-template-compilation) (low, CVSS 3.1, published 6 May 2021)
- [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.js Project Handlebars.js vulnerabilities

- [CVE-2026-33937: Handlebars.js remote code execution via AST type confusion in compile](https://junglewise.ai/threats/cve-2026-33937-handlebars-js-remote-code-execution-via-ast-type-confusion-in) (critical, CVSS 9.8, published 27 Mar 2026)
- [CVE-2026-33941: Handlebars handlebars.js code injection in CLI precompiler](https://junglewise.ai/threats/cve-2026-33941-handlebars-handlebars-js-code-injection-in-cli-precompiler) (high, CVSS 8.2, published 27 Mar 2026)
- [CVE-2026-33938: Handlebars.js remote code execution via @partial-block AST injection](https://junglewise.ai/threats/cve-2026-33938-handlebars-js-remote-code-execution-via-partial-block-ast) (high, CVSS 8.1, published 27 Mar 2026)
- [CVE-2026-33940: Handlebars.js remote code execution via AST type confusion](https://junglewise.ai/threats/cve-2026-33940-handlebars-js-remote-code-execution-via-ast-type-confusion) (high, CVSS 8.1, published 27 Mar 2026)
- [CVE-2026-33939: Handlebars.js denial of service via malformed decorator syntax](https://junglewise.ai/threats/cve-2026-33939-handlebars-js-denial-of-service-via-malformed-decorator-syntax) (high, CVSS 7.5, published 27 Mar 2026)
- [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-2021-23369: Handlebars remote code execution in template compilation](https://junglewise.ai/threats/cve-2021-23369-handlebars-remote-code-execution-in-template-compilation) (low, CVSS 3.1, published 6 May 2021)

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