Is handlebars 1.1 vulnerable?
npm · 3 releases from 1.1.0 to 1.1.2 · latest handlebars is 4.7.10 · checked 2 Nov 2026
Yes: 9 known advisories
Yes. handlebars 1.1.2, the last 1.1 release, is affected by 9 known security advisories (3 critical, 5 high, 1 medium), including CVE-2021-23383, CVE-2021-23369, CVE-2019-19919. Upgrade to 4.7.7 or later to fix all of them.
npm install handlebars@4.7.7Advisories affecting handlebars 1.1.2
Prototype Pollution in handlebars
- Affected
- <4.7.7
- Fixed in
- 4.7.7
Arbitrary Code Execution in Handlebars
- Affected
- <3.0.8 · >=4.0.0 <4.5.3
- Fixed in
- 3.0.8, 4.5.3
Remote code execution in handlebars when compiling templates
- Affected
- <4.7.7
- Fixed in
- 4.7.7
Arbitrary Code Execution in handlebars
- Affected
- <3.0.8 · >=4.0.0 <4.5.3
- Fixed in
- 3.0.8, 4.5.3
Prototype Pollution in handlebars
- Affected
- <3.0.8 · >=4.0.0 <4.5.3
- Fixed in
- 3.0.8, 4.5.3
Arbitrary Code Execution in handlebars
- Affected
- <3.0.8 · >=4.0.0 <4.5.2
- Fixed in
- 3.0.8, 4.5.2
Prototype Pollution in handlebars
- Affected
- >=4.0.0 <4.3.0 · <3.0.8
- Fixed in
- 3.0.8, 4.3.0
Prototype Pollution in handlebars
- Affected
- >=4.1.0 <4.1.2 · >=4.0.0 <4.0.14 · <3.0.7
- Fixed in
- 3.0.7, 4.0.14, 4.1.2
Cross-Site Scripting in handlebars
- Affected
- <4.0.0
- Fixed in
- 4.0.0
Which of your client projects are still on handlebars 1.1?
NPMscan reads the lockfiles in every GitHub repo you pick, finds the exact handlebars version each one installs, and checks it against these advisories. Each finding comes with the command that fixes it.
Other handlebars versions
Advisory data from OSV.dev (opens OSV.dev in a new tab), which includes the GitHub Advisory Database. Release list from the npm registry. Refreshed daily.