Category

Ejs

Security vulnerabilities and automated fixes for ejs issues

4 posts found

critical7 min

How Server-Side Template Injection Happens in EJS and How to Fix It

CVE-2022-29078 is a critical server-side template injection vulnerability in EJS versions prior to 3.1.7 that allows attackers to execute arbitrary code through the `outputFunctionName` parameter. The fix involves upgrading EJS from 2.6.1 to 3.1.7, which implements proper input validation for template rendering options. This vulnerability could allow remote code execution if user-controlled data reaches the template engine without sanitization.

#injection#ssti#nodejs+2 more
A
anupamme
Aug 31, 2026
critical7 min

How Server-Side Template Injection happens in Node.js EJS and how to fix it

CVE-2022-29078 is a critical server-side template injection (SSTI) vulnerability in EJS versions prior to 3.1.7, where the `outputFunctionName` option is passed directly into generated code without sanitization, allowing attackers to execute arbitrary JavaScript on the server. The fix upgrades the EJS dependency from 2.7.4 to 3.1.7+ (resolved here as 6.0.1), eliminating the unsafe code generation path. Any Node.js application rendering EJS templates with user-influenced options is at risk of ful

#injection#ssti#nodejs+4 more
A
anupamme
Aug 26, 2026
critical9 min

How Algolia API key exposure happens in EJS templates and how to fix it

A critical vulnerability in `layout/_plugins/global/config.ejs` was exposing Algolia API credentials — including `appId` and `apiKey` — directly in rendered HTML, making them visible to any user who inspects the page source. The fix removes raw credential interpolation from the template and replaces unsafe string embedding with properly sanitized output using `JSON.stringify()`. This eliminates the risk of unauthorized Algolia API access by anyone who visits the page.

#security#credential-exposure#ejs+4 more
A
anupamme
Jul 31, 2026
critical6 min

How server-side template injection happens in Node.js EJS and how to fix it

A critical server-side template injection vulnerability (CVE-2022-29078) was discovered in EJS version 3.1.6, allowing attackers to execute arbitrary code on the server through the `outputFunctionName` option. This vulnerability was fixed by upgrading EJS from 3.1.6 to 3.1.7 in the react-redux-bad-algo project, eliminating a dangerous remote code execution vector.

#security#ssti#nodejs+4 more
A
anupamme
Jul 30, 2026