Remote code execution via the `pretty` option.

Description

If a remote attacker was able to control the pretty option of the pug compiler, e.g. if you spread a user provided object such as the query parameters of a request into the pug template inputs, it was possible for them to achieve remote code execution on the node.js backend.

Recommendation

Update the pug package to the latest compatible version. Followings are version details:

• Affected version(s): < 3.0.1
• Patched version(s): 3.0.1

References

• GHSA-p493-635q-r6gr
• www.npmjs.com
• CVE-2021-21353
• CWE-74
• CWE-94
• CAPEC-310
• OWASP 2021-A3
• OWASP 2021-A6

Related Issues

• OpenLearnX has Critical Remote Code Execution Through Python Sandbox Escape via Code Execution Environment - CVE-2026-41900
• Parse Server vulnerable to remote code execution via MongoDB BSON parser through prototype pollution - CVE-2023-36475
• FUXA Unauthenticated Remote Code Execution via Arbitrary File Write in Upload API - CVE-2026-25895
• paperclip Vulnerable to Unauthenticated Remote Code Execution via Import Authorization Bypass - paperclipai - CVE-2026-41679

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How to Secure your NodeJs Express Javascript Application - part 1

How to Secure your NodeJs Express Javascript Application - part 2

10 Secure Coding Best Practices to Follow in Every Project

Tags:

npm

pug