Technology · Handlebars.js Project
Handlebars.js Project Handlebars.js vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 9 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, Handlebars.js prototype method access control gap via missing __lookupSetter__, was published on 29 March 2026.
- Last 7 days
- 0
- Last 90 days
- 0
- Critical, all time
- 1
- Exploited in the wild
- 0
About Handlebars.js Project Handlebars.js
An extension to the Mustache templating language for building semantic templates.
Latest Handlebars.js Project Handlebars.js vulnerabilities
- Handlebars.js prototype method access control gap via missing __lookupSetter__lowCVSS 3.1
- CVE-2026-33941: Handlebars handlebars.js code injection in CLI precompilerhighCVSS 8.2EPSS 0.2%
- CVE-2026-33940: Handlebars.js remote code execution via AST type confusionhighCVSS 8.1EPSS 0.8%
- CVE-2026-33939: Handlebars.js denial of service via malformed decorator syntaxhighCVSS 7.5EPSS 0.8%
- CVE-2026-33938: Handlebars.js remote code execution via @partial-block AST injectionhighCVSS 8.1EPSS 0.8%
- CVE-2026-33937: Handlebars.js remote code execution via AST type confusion in compilecriticalCVSS 9.8EPSS 1.7%
- CVE-2021-23369: Handlebars remote code execution in template compilationlowCVSS 3.1EPSS 7.0%
- Handlebars.js remote code execution via template injectioninfo
- CVE-2015-8861: Handlebars.js XSS in unquoted template attributesmediumCVSS 6.1EPSS 2.6%
Most severe Handlebars.js Project Handlebars.js vulnerabilities
Exploited in the wild first, then by severity and CVSS score.
- CVE-2026-33937: Handlebars.js remote code execution via AST type confusion in compilecriticalCVSS 9.8EPSS 1.7%
- CVE-2026-33941: Handlebars handlebars.js code injection in CLI precompilerhighCVSS 8.2EPSS 0.2%
- CVE-2026-33938: Handlebars.js remote code execution via @partial-block AST injectionhighCVSS 8.1EPSS 0.8%
- CVE-2026-33940: Handlebars.js remote code execution via AST type confusionhighCVSS 8.1EPSS 0.8%
- CVE-2026-33939: Handlebars.js denial of service via malformed decorator syntaxhighCVSS 7.5EPSS 0.8%
- CVE-2015-8861: Handlebars.js XSS in unquoted template attributesmediumCVSS 6.1EPSS 2.6%
- CVE-2021-23369: Handlebars remote code execution in template compilationlowCVSS 3.1EPSS 7.0%
- Handlebars.js prototype method access control gap via missing __lookupSetter__lowCVSS 3.1
- Handlebars.js remote code execution via template injectioninfo
Vulnerabilities per week
The last 13 weeks, by the week each vulnerability was published.
| Week of | Bar | Vulns | Critical |
|---|---|---|---|
| 29 Jun 2026 | 0 | 0 | |
| 6 Jul 2026 | 0 | 0 | |
| 13 Jul 2026 | 0 | 0 | |
| 20 Jul 2026 | 0 | 0 | |
| 27 Jul 2026 | 0 | 0 | |
| 3 Aug 2026 | 0 | 0 | |
| 10 Aug 2026 | 0 | 0 | |
| 17 Aug 2026 | 0 | 0 | |
| 24 Aug 2026 | 0 | 0 | |
| 31 Aug 2026 | 0 | 0 | |
| 7 Sep 2026 | 0 | 0 | |
| 14 Sep 2026 | 0 | 0 | |
| 21 Sep 2026 | 0 | 0 |
How this is built
Junglewise Threat Intelligence collects vulnerabilities from NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories, and matches each one to the technologies and vendors it affects. Dates are the date a vulnerability was published, in UTC.
The pages are rebuilt from the database every hour. Frozen weekly and monthly reports never change once published, so they can be cited.
Use this data
The same data is at https://junglewise.ai/threats/technologies/handlebars-js.json, for scripts and language models. It is free to reuse under CC BY 4.0 with a link back to this page.
Cite as: Junglewise Threat Intelligence, "Handlebars.js Project Handlebars.js vulnerabilities", https://junglewise.ai/threats/technologies/handlebars-js, 26 September 2026.