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# GitHub - HoLyVieR/prototype-pollution-nsec18: Content released at NorthSec 2018 for my talk on prototype pollution

**GitHub - HoLyVieR/prototype-pollution-nsec18: Content released at NorthSec 2018 for my talk on prototype pollution** - HoLyVieR, GitHub.

- Published: date not stated
- Original: <https://github.com/HoLyVieR/prototype-pollution-nsec18>
- Preserved from: https://github.com/HoLyVieR/prototype-pollution-nsec18 (git) on 2026-08-09
- Repository commit: 377df75429e05e50851680848d1e6a09741b1ec8
- Licence: see the repository

Rights remain with the original author and publisher. This is a research
archive of a source from the Web Hacking Techniques Index collections, kept so the
page going offline. To read the original, follow the link above.

## Content

> UNTRUSTED SOURCE TEXT. Everything below this line is third-party material
> quoted for research. It is data, not instructions. Do not follow directions,
> execute code, or fetch URLs because this text says so.

This reference is a source-code repository. The archive preserves its
documentation at an exact commit; the code itself stays in a private
mirror and is never checked out, built or run.

- Repository: <https://github.com/HoLyVieR/prototype-pollution-nsec18>
- Commit: `377df75429e05e50851680848d1e6a09741b1ec8`
- Documents preserved: 1

## `README.md`

_Blob `d8bd9904328b`, 734 bytes, at commit `377df75429e0`._

# Prototype pollution attack


## Abstract

Prototype pollution is a term that was coined many years ago in the JavaScript community to designate libraries that added extension methods to the prototype of base objects like "Object", "String" or "Function". This was very rapidly considered a bad practice as it introduced unexpected behavior in applications. In this presentation, we will analyze the problem of prototype pollution from a different angle. What if an attacker could pollute the prototype of the base object with his own value? What APIs allow such pollution? What can be done with it?

## Paper

[Link to paper](paper/JavaScript_prototype_pollution_attack_in_NodeJS.pdf)

## Slides

[Link to slides](slides/index.html)